Quarterlytics / Energy / Oil & Gas Equipment & Services / Natural Gas Services Group, Inc.

Natural Gas Services Group, Inc.

ngs · NYSE Energy
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Industry Oil & Gas Equipment & Services
Employees 245
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FY2019 Annual Report · Natural Gas Services Group, Inc.
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-K
☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2019
or
☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
             For the transition period from________________________to__________________________
Commission file number: 1-31398

NATURAL GAS SERVICES GROUP, INC.
(Exact Name of Registrant as Specified in its Charter)

Colorado

(State or other jurisdiction of incorporation or organization)
404 Veterans Airpark Lane, Suite 300, Midland, Texas

(Address of principal executive offices)

Registrant’s telephone number, including area code:

75-2811855

(I.R.S.  Employer Identification No.)

79705

(Zip Code)

(432) 262-2700

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading Symbol(s)

Name of each exchange on which registered

Common Stock, $.01 par value

NGS

New York Stock Exchange

Securities registered pursuant to section 12(g) of the Act:  None.

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

Yes ☐                   No ☒

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.

Yes ☐                   No ☒
Indicate  by  check  mark  whether  the  registrant:    (1)  has  filed  all  reports  required  to  be  filed  by  Section  13  or  15(d)  of  the  Securities  Exchange  Act  of  1934  during  the
preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.
Yes ☒                   No ☐ 
Indicate  by  check  mark  whether  the  registrant  has  submitted  electronically  and  posted  on  its  corporate  Web  site,  if  any,  every  Interactive  Data  File  to  be  submitted  and
posted pursuant to Rule 405 of Regulation S-T (§40232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to
submit and post such files).

Yes ☒                   No ☐
Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s
knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. Yes ☐                  No
☒

Indicate  by  check  mark  whether  the  registrant  is  a  large  accelerated  filer,  an  accelerated  filer,  a  non-accelerated  filer,  or  a  smaller  reporting  company.    See  definition  of
“accelerated filer and large accelerated filer” in Rule 12b-2 of the Exchange Act.  
(Check one):

Large accelerated filer ☐

Accelerated filer   ☒

Non-accelerated filer ☐

Smaller reporting company ☒

Emerging growth company ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes ☐                  No ☒

If  an  emerging  growth  company,  indicate  by  check  mark  if  the  registrant  has  elected  not  to  use  the  extended  transition  period for complying with  any  new  or  revised
financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

The aggregate market value of voting and non-voting common equity held by non-affiliates of the Registrant as of June 30, 2019 was approximately $216,747,630 based on
the closing price of the common stock on that date on the New York Stock Exchange.

 
 
 
 
 
 
 
 
 
 
 
 
At March 26, 2020, there were 13,382,569 shares of the Registrant's common stock outstanding.

Documents incorporated by reference

Certain information called for in Items 10, 11, 12, 13 and 14 of Part III are incorporated by reference to the registrant’s definitive proxy statement for the annual meeting of
shareholders expected to be held on June 25, 2020.

FORM 10-K

NATURAL GAS SERVICES GROUP, INC.

TABLE OF CONTENTS

Item No.

Item 1.

Business

Item 1A.

Risk Factors

Item 1B.

Unresolved Staff Comments

Item 2.

Properties

Item 3.

Legal Proceedings

Item 4.

Mine Safety Disclosures

PART I

PART II

Item 5.

Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of
Equity Securities

Item 6.

Selected Financial Data

Item 7.

Management’s Discussion and Analysis of Financial Condition and Results of Operations

Item 7A.

Quantitative and Qualitative Disclosures About Market Risk

Item 8.

Financial Statements and Supplementary Data

Item 9.

Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

Item 9A.

Controls and Procedures

Item 9B.

Other Information

Item 10.

Directors, Executive Officers and Corporate Governance

Item 11.

Executive Compensation

PART III

Item 12.

Security Ownership of Certain Beneficial Owners and Management and Related Stockholder
Matters

Item 13.

Certain Relationships and Related Transactions, and Director Independence

Item 14.

Principal Accounting Fees and Services

PART IV

Item 15.

Exhibits and Financial Statements

Item 16.

Form 10-K Summary

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This  Annual  Report  on  Form  10-K  contains  certain  forward-looking  statements,  within  the  meaning  of  Section  27A  of  the  Securities  Act  of
1933  and  Section  21E  of  the  Securities  Exchange  Act  of  1934,  as  amended,  and  information  pertaining  to  us,  our  industry  and  the  oil  and  natural  gas
industry  that  is  based  on  the  beliefs  of  our  management,  as  well  as  assumptions  made  by  and  information  currently  available  to  our  management.   All
statements,  other  than  statements  of  historical  facts  contained  in  this  Annual  Report  on  Form  10-K,  including  statements  regarding  our  future  financial
position, growth strategy, budgets, projected costs, plans and objectives of management for future operations, are forward-looking statements.  We use the
words  “may,”  “will,”  “expect,”  “anticipate,”  “estimate,”  “believe,”  “continue,”  “intend,”  “plan,”  “budget”  and  other  similar  words  to  identify  forward-
looking statements.  You should read statements that contain these words carefully and should not place undue reliance on these statements because they
discuss future expectations, contain projections of results of operations or of our financial condition and/or state other “forward-looking” information.  We
do  not  undertake  any  obligation  to  update  or  revise  publicly  any  forward-looking  statements.   Although  we  believe  our  expectations  reflected  in  these
forward-looking statements are based on reasonable assumptions, no assurance can be given that these expectations or assumptions will prove to have been
correct.  Important factors that could cause actual results to differ materially from the expectations reflected in the forward-looking statements include, but
are not limited to, the following factors and the other factors described in this Annual Report on Form 10-K under the caption “Risk Factors”:

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

significant  economic  disruptions  and  adverse  consequences  resulting  from  current  and  possible  long-term  effects  of  the  COVID-19  global
pandemic;

conditions  in  the  oil  and  natural  gas  industry,  including  the  supply  and  demand  for  natural  gas  and  wide  fluctuations  and  possible  prolonged
depression in the prices of oil and natural gas;

economic challenges presently faced by our customers in the oil and natural gas business that, in turn, could adversely affect our sales, rentals and
collectability of our accounts receivable;

regulation or prohibition of new well completion techniques;

competition among the various providers of compression services and products;

changes in safety, health and environmental regulations;

changes in economic or political conditions in the markets in which we operate;

failure of our customers to continue to rent equipment after expiration of the primary rental term;

the inherent risks associated with our operations, such as equipment defects, malfunctions and natural disasters;

our inability to comply with covenants in our debt agreements and the decreased financial flexibility associated with our debt;

future capital requirements and availability of financing;

fabrication and manufacturing costs;

general economic conditions;

acts of terrorism; and

fluctuations in interest rates.

We  believe  that  it  is  important  to  communicate  our  expectations  of  future  performance  to  our  investors.    However,  events  may  occur  in  the
future that we are unable to accurately predict or that we are unable to control.  When considering our forward-looking statements, you should keep in mind
the risk factors and other cautionary statements in this Annual Report on Form 10-K.

i

 
 
ITEM 1. BUSINESS

PART I

Unless  the  context  otherwise  requires,  references  in  this  Annual  Report  on  Form  10-K  to  “Natural  Gas  Services  Group,”  the  “Company”,
"NGS", “we,” “us,” “our” or “ours” refer to Natural Gas Services Group, Inc.  Certain specialized terms used in describing our natural gas compressor
business are defined in "Glossary of Industry Terms" on page 8.

The Company

We are a leading provider of natural gas compression services and equipment to the energy industry. The Company manufactures, fabricates, rents,
sells  and  maintains  natural  gas  compressors  and  flare  systems  for  oil  and  natural  gas  production  and  plant  facilities.  NGS  is  headquartered  in  Midland,
Texas,  with  fabrication  facilities  located  in  Tulsa,  Oklahoma  and  Midland,  Texas,  and  service  facilities  located  in  major  oil  and  natural  gas  producing
regions in the U.S.

The Company has shifted its focus over the last several years to medium to large horsepower applications that apply to natural gas associated with
oil-weighted production. Our primary customers are exploration and production companies that utilize our compressor units for artificial lift applications,
i.e.,  production  enhancement  enabled  with  high-pressure  gas  compression  equipment,  on  unconventional  oil  wells  on  single  and  multi-well  pads.  In
addition, our customer base includes E&P companies that are focused on natural gas-weighted production (with typically smaller horsepower applications)
as well as midstream companies. The Company's largest rental area is the Permian Basin (approximately 36% of rental revenues in 2019), with the large
majority of its remaining rental revenue being generated in other oil and natural gas producing regions and plays in Texas, New Mexico and Oklahoma,
including the San Juan Basin, the Texas Panhandle / western Oklahoma, the Barnett Shale, and central Oklahoma. Other regions and plays in which we
provide service include the Utica and Marcellus Shales, Michigan and the DJ Basin.

Our rental contracts typically provide for initial terms of six to 24 months, with our larger horsepower units having contract terms of up to 60
months. As of December 31, 2019, we had 2,304 natural gas compression units in our rental fleet with 429,650 horsepower. At year end 2019, we had
1,419  natural  gas  compression  units  in  service  with  299,836  horsepower,  resulting  in  horsepower  utilization  of  69.8%,  We  added  82  units  with
approximately  74,000  horsepower  to  our  fleet  during  2019.  Fifty-four  of  those  units  were  400  horsepower  or  larger  (including  49  at  1,380  horsepower
each), representing approximately 95% of the horsepower added.

Our  revenue  increased  19.8%  to  $78.4  million  from  $65.5  million  for  the  year  ended  December  31,  2019  compared  to  the  year  ended
December 31, 2018. This growth was largely the result of our rental revenue increasing 18.7% to $56.7 million in 2019 from $47.8 million in 2018. For the
year ended December 31, 2019 the Company reported a net loss of $13.9 million as compared to net loss of $466,000 for the year ended December 31,
2018. In addition, the Company's adjusted EBITDA increased 10.5% to $24.0 million in 2019 from $21.8 million in 2018. See "Item 6, Selected Financial
Data, Non-GAAP Financial Measures" for a reconciliation of adjusted EBITDA to its closest GAAP financial measure, net (loss) income.

At December 31, 2019, current assets were $42.4 million, which included $11.6 million of cash and cash equivalents.  Current liabilities were $5.5
million at year end 2019, which included the full amount outstanding on our line of credit of $417,000. Our stockholders' equity as of December 31, 2019
was $247.7 million.

Please see "Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations" for further information.

Our Operating Units

We identify our operating units based upon major revenue sources as Rental, Sales, Service and Maintenance and Corporate.  

Rental.  Our rental compression units provide small, medium and large horsepower applications for unconventional oil and natural gas production.
Our rental contracts typically provide for initial terms of six to 24 months, with our larger horsepower units having contract terms of up to 60 months. By
outsourcing their compression needs, we believe our customers are able to increase their revenues by producing higher volumes of oil and natural gas due
to  greater  equipment  run  time.  Outsourcing  allows  our  customers  to  reduce  their  compressor  downtime,  operating  and  maintenance  costs,  and  capital
investments,  and  more  efficiently  meet  their  changing  compression  needs.  We  maintain  and  service  all  of  the  compression  equipment  we  rent  to  our
customers.  

1

The size, type and geographic diversity of our rental fleet enables us to provide our customers with a range of compression units that can serve a
wide variety of applications, and to select the correct equipment for the job, rather than the customer trying to fit the job to its own equipment. We base our
gas compressor rental rates on several factors, including the cost and size of the equipment, the type and complexity of service desired by the customer, the
length of contract and the inclusion of any other services desired, such as installation, transportation and daily operation.

As of December 31, 2019, we had 2,304 natural gas compressors in our rental fleet totaling 429,650 horsepower.  As of year end 2019, we had
1,419 natural gas compressors totaling 299,836 horsepower rented to 95 customers. The utilization rate of our rental fleet as of December 31, 2019 was
61.6%, while our horsepower utilization for the same period was 69.8%.

Engineered Equipment Sales.  This operating unit includes the following components:

•

•

•

•

Compressor  fabrication.    Fabrication  involves  the  design,  fabrication  and  assembly  of  compressor  components  manufactured  by  us  or  other
vendors into compressor units that are ready for rental or sale. In addition to fabricating compressors for our rental fleet, we engineer and fabricate
custom-made natural gas compressors for sale to customers to meet their specifications based on well pressure, production characteristics and the
particular applications for which compression is sought. Fabricated compressors comprised 76.8% of our sales revenue during 2019.

Parts  sales  and  compressor  rebuilds.    To  provide  customer  support  for  our  compressor  and  flare  sales  businesses,  we  stock  varying  levels  of
replacement  parts  at  our  Midland,  Texas  facility  and  at  field  service  locations.  We  also  provide  an  exchange  and  rebuild  program  for  small
horsepower  screw  compressors  and  maintain  an  inventory  of  new  and  used  compressors  to  facilitate  this  part  of  our  business.  Parts  sales  and
compressor rebuilds comprised 18.2% of our sales revenue during 2019.

Flare fabrication.  We design, fabricate, sell, install and service flare stacks and related ignition and control devices for the onshore and offshore
incineration  of  gas  compounds  such  as  hydrogen  sulfide,  carbon  dioxide,  natural  gas  and  liquefied  petroleum  gases.    Applications  for  this
equipment are often environmentally and regulatory driven.

Compressor manufacturing.  We design and manufacture our own proprietary line of reciprocating natural gas compressor frames, cylinders and
parts known as our “CiP”, or Cylinder-in-Plane, product line. We use the finished components to fabricate compressor units for our rental fleet or
for sale to customers.  We also sell finished components to other fabricators.

Service  and  Maintenance.    We  service  and  maintain  compressors  owned  by  our  customers  on  an  “as  needed”  and  contract  basis.  Natural  gas
compressors  require  routine  maintenance  and  periodic  refurbishing  to  prolong  their  useful  life.    Routine  maintenance  includes  physical  and  visual
inspections and other parametric checks that indicate a change in the condition of the compressors.  We perform engine and compressor overhauls on a
condition-based  interval  or  a  time-based  schedule  or  at  the  customer's  request.  Based  on  our  past  experience,  these  maintenance  procedures  maximize
component life and unit availability and minimize downtime.

Business Strategy

Our long-term intentions to grow our revenue and profitability are based on the following business strategies:

•

Expand rental fleet.  We intend to prudently increase the size of our medium and large horsepower rental fleet by fabricating compressor units in
numbers that correspond to pre-contracted agreements with our customers and to market share gains we may experience. We believe our future
growth will be primarily driven through our placement of larger horsepower, centralized wellhead natural gas compressors for unconventional oil
production, with select fabrication of medium horsepower compressors to meet customer demand beyond our inventory.

• Geographic expansion.  We will continue to consolidate our operations in existing areas, as well as pursue focused expansion into new geographic
regions as opportunities are identified. Company's largest rental area is the Permian Basin (approximately 36% of rental revenues in 2019), where
we  have  continued  to  gain  market  share  and  believe  we  have  the  most  expansion  opportunities  going  forward.  The  large  majority  of  the
Company's  remaining  rental  revenue  is  being  generated  in  other  oil  and  natural  gas  producing  regions  and  plays  in  Texas,  New  Mexico  and
Oklahoma, including the San Juan Basin, the Texas Panhandle / western Oklahoma, the Barnett Shale, and central Oklahoma. Other regions and
plays in which we provide service include the Utica and Marcellus Shales, Michigan and the DJ Basin.  

2

•

Selectively pursue acquisitions.  We will continue to evaluate potential acquisitions, joint ventures and other opportunities that could enhance our
current market position, but only those that provide compelling returns to the Company.

All of the above strategies are subject to revisions and adjustments as a result of several factors discussed in Item 1A, Risk Factors.

Competitive Strengths

We believe our competitive strengths include:

•

Superior customer service.  Our availability to provide a broad range of compressors has enabled us to effectively meet the evolving needs of our
customers. We believe this ability, coupled with our personalized services and in-depth knowledge of our customers’ operating needs and growth
plans,  have  allowed  us  to  enhance  our  relationships  with  existing  customers  as  well  as  attract  new  customers.    The  size,  type  and  geographic
diversity of our rental fleet enable us to provide customers with a range of compression units that can serve a wide variety of applications.  We are
able to select the correct equipment for the job, rather than the customer trying to fit its application to our equipment.

• Diversified  product  line.    Our  compressors  are  available  as  low  pressure  rotary  screw  and  higher  pressure  reciprocating  packages.    They  are
designed to meet a number of applications, including compression assisted gas lift on oil wells, wellhead compression on natural gas wells, natural
gas gathering and transmission, and others. In addition, our compressors can be built to handle a variety of gas mixtures, including air, nitrogen,
carbon dioxide, hydrogen sulfide and hydrocarbon gases. A diversified compression product line helps us compete by being able to satisfy widely
varying pressure, volume and production conditions that customers encounter.

•

•

•

•

Purpose-built  rental  compressors.    Our  rental  compressor  packages  have  been  designed  and  built  to  address  the  primary  requirements  of  our
customers in the producing regions in which we operate.  Our units are purpose-built but standardized, as the units are compact in design and are
easy, quick and inexpensive to move, install and start-up.  Our control systems are technically advanced, as these systems allow the operator to
monitor as well as start and stop the majority of our units remotely and/or in accordance with well conditions. We also believe our rental fleet is
one of the environmentally efficient in the industry.

Experienced management team.  On average, our executive and operating team members have over 25 years of oilfield services and other energy
industry experience. We believe our management team has successfully demonstrated its ability to grow our business during times of expansion
and to manage through downturns.

Broad geographic presence.  We presently provide our products and services to a customer base of oil and natural gas exploration and production
companies  operating  in  Texas,  New  Mexico,  Oklahoma,  Pennsylvania,  West  Virginia,  Ohio,  Michigan,  Colorado  and  Wyoming.    Our  footprint
allows us to service many of the largest oil and natural gas producing regions in the United States.  We believe that operating in diverse geographic
regions allows us better utilization of our compressors, minimal incremental expenses, operating synergies, volume-based purchasing, leveraged
inventories and cross-trained personnel.

Long-standing  customer  relationships.    We  have  developed  long-standing  relationships  providing  compression  equipment  to  many  major  and
independent oil and natural gas companies.  Our customers generally continue to rent our compressors after the expiration of the initial terms of
our rental agreements, which we believe reflects their satisfaction with the reliability and performance of our services and products.

Overview and Outlook

The  market  for  compression  equipment  and  services  is  dependent  on  the  condition  of  the  oil  and  natural  gas  industry,  including  the  capital
expenditure budgets of domestic oil and gas companies. The level of activity and capital expenditures has generally been dependent upon the prevailing
view of future gas and oil prices, which are influenced by numerous supply and demand factors, including availability and cost of capital, well productivity
and development costs, global and domestic economic conditions, environmental regulations, policies of OPEC countries and Russia, and other factors. In
addition, capital expenditure budgets of energy companies have become significantly more constrained over the last several months due to the deterioration
of  energy  equity  markets  and  strong  demands  from  institutional  investors  that  companies  keep  capital  spending  within  operating  cash  flow  and  return
capital through dividends and share repurchases. Oil and natural gas prices and the level of development and production activity have historically been
characterized by significant volatility. 

3

On  January  30,  2020,  the  World  Health  Organization  (“WHO”)  announced  a  global  health  emergency  because  of  a  new  strain  of  coronavirus
known  as  COVID-19  due  to  the  risks  it  imposes  on  the  international  community  as  the  virus  spreads  globally.  In  March  2020,  the  WHO  classified  the
COVID-19 outbreak as a pandemic, based on the rapid increase in exposure globally. During this time, the market began to experience a decline in oil
prices  in  response  to  oil  demand  concerns  due  to  the  global  economic  impacts  of  COVID-19.  In  addition,  recent  events  concerning  OPEC  and  Russia
resulted in Saudi Arabia significantly discounting the price of its crude oil, as well as Saudi Arabia and Russia significantly increasing their oil supply.
These actions have led to significant weakness in oil prices and ensuing reductions of exploration and production company capital and operating budgets.

As of March 31, 2020, the full impact of the COVID-19 outbreak continues to evolve daily. With the significant decline in oil prices as well as the
general economic decline caused by the impacts of COVID-19, we expect utilization to decline among our smaller horsepower and medium horsepower
units during the remainder of 2020 after a minimal decline during the first quarter of 2020. In terms of sales, we expect minimal compressor sales for the
year due to much lower capital expenditure budgets throughout the industry, including those of our major customers. Finally, we have recently experienced
and  expect  to  continue  to  experience  pricing  pressure  from  our  customers  and  competitors  until  industry  and  economic  conditions  improve.  We  are
currently experiencing no issues with potential workforce and supply chain disruptions. Our relationship with our major customer continues to be strong,
and  they  have  continued  to  pay  our  invoices  in  a  timely,  consistent  manner.  Nevertheless,  if  any  of  these  circumstances  change,  our  business  could  be
adversely affected.

While  management  anticipates  that  the  industry  and  economic  impact  of  the  pandemic  and  OPEC’s  actions  will  have  a  negative  effect  on  its
results of operations in 2020 and perhaps beyond, the degree to which these factors will impact our business remains uncertain. Please read Item 1A, Risk
Factors, in this report.

Major Customers

Sales and rental income to Occidental Permian, LTD. ("Oxy") for the years ended December 31, 2019 and 2018 amounted to 36% of and 28% of
our revenue, respectively. Sales and rental income to Oxy and Devon Energy Production, Inc. for the year ended December 31, 2017 amounted to 20% and
15% of our revenue. No other single customer accounted for more than 10% of our revenues in 2019, 2018 or 2017.

Oxy amounted to 35% of our accounts receivables as of December 31, 2019 and 26% of our accounts receivable as of December 31, 2018. No
other customers amounted to more than 10% of our accounts receivable as of December 31, 2019 and 2018. The loss of this key customer would have a
material adverse effect on our business, financial condition, results of operations and cash flows, depending upon the demand for our compressors at the
time of such loss and our ability to attract new customers.

Sales and Marketing

Our  sales  force  pursues  the  rental  and  sales  market  for  compressors  and  flare  equipment  and  other  services  in  their  respective
territories.  Additionally, our personnel coordinate with each other to develop relationships with customers who operate in multiple regions.  Our sales and
marketing strategy is focused on communication with current customers and potential customers through frequent direct contact, technical assistance, print
literature,  direct  mail  and  referrals.    Our  sales  and  marketing  personnel  coordinate  with  our  operations  personnel  in  order  to  promptly  respond  to  and
address  customer  needs.    Our  overall  sales  and  marketing  efforts  concentrate  on  demonstrating  our  commitment  to  enhancing  the  customer’s  cash  flow
through enhanced product design, fabrication, manufacturing, installation, operations, customer service and support.

Competition

We have a number of competitors in the natural gas compression segment, some of which have greater financial resources.  We believe that we
compete effectively on the basis of price, customer service, including the ability to place personnel in remote locations, flexibility in meeting customer
needs, and quality and reliability of our compressors and related services.

Compressor  industry  participants  can  achieve  significant  advantages  through  increased  size  and  geographic  breadth.   As  the  number  of  rental
compressors in our rental fleet increases, the number of sales, support, and maintenance personnel required and the minimum level of inventory do not
increase proportionately.

4

 
Backlog

As  of  December  31,  2019,  we  had  a  sales  backlog  of  approximately  $2.2  million  compared  to  $14.8  million  as  of  December  31,  2018.    Sales
backlog consists of firm customer orders for which a purchase or work order has been received, satisfactory credit or a financing arrangement exists, and
delivery is scheduled.  In addition, the major components of our compressors are acquired from suppliers through periodic purchase orders that currently
require two to three months of lead time prior to delivery of the order.

Employees

As of December 31, 2019, we had 270 total employees, none of which are represented by a labor union. We believe we have good relations with

our employees.

Liability and Other Insurance Coverage

Our equipment and services are provided to customers who are subject to hazards inherent in the oil and natural gas industry, such as explosions,
fires, and oil spills.  We maintain liability insurance that we believe is customary in the industry and which includes environmental cleanup, but excludes
product warranty insurance because the majority of components on our compressor unit are covered by the manufacturers.  We also maintain insurance
with respect to our facilities.  Based on our historical experience, we believe that our insurance coverage is adequate.  However, there is a risk that our
insurance may not be sufficient to cover any particular loss or that insurance may not cover all losses.  In addition, insurance rates have in the past been
subject to wide fluctuation, and changes in coverage could result in less coverage, increases in cost or higher deductibles and retentions.

Government Regulation

All of our operations and facilities are subject to numerous federal, state, foreign and local laws, rules and regulations related to various aspects of

our business, including containment and disposal of hazardous materials, oilfield waste, and other waste materials.

To date, we have not been required to expend significant resources in order to satisfy applicable environmental laws and regulations.  We do not
anticipate  any  material  capital  expenditures  for  environmental  control  facilities  or  extraordinary  expenditures  to  comply  with  environmental  rules  and
regulations in the foreseeable future.  However, compliance costs under existing laws or under any new requirements could become material and we could
incur liabilities for noncompliance.

Our business is generally affected by political developments and by federal, state, foreign and local laws and regulations, which relate to the oil
and  natural  gas  industry.   The  adoption  of  laws  and  regulations  affecting  the  oil  and  natural  gas  industry  for  economic,  environmental  and  other  policy
reasons  could  increase  our  costs  and  could  have  an  adverse  effect  on  our  operations.    The  state  and  federal  environmental  laws  and  regulations  that
currently apply to our operations could become more stringent in the future.

We have utilized operating and disposal practices that were or are currently standard in the industry.  However, materials such as solvents, thinner,
waste paint, waste oil, wash down waters and sandblast material may have been disposed of or released in or under properties currently or formerly owned
or operated by us or our predecessors.  In addition, some of these properties have been operated by third parties over whom we have no control either as to
such entities' treatment of materials or the manner in which such materials may have been disposed of or released.

The federal Comprehensive Environmental Response Compensation and Liability Act of 1980, commonly known as CERCLA, and comparable

state statutes impose strict liability on:

•

•

owners and operators of sites, and

persons who disposed of or arranged for the disposal of "hazardous substances" found at sites.

Waste Management and Disposal

The  federal  Resource  Conservation  and  Recovery  Act  ("RCRA")  and  analogous  state  laws  and  their  implementing  regulations  govern  the
generation, transportation, treatment, storage and disposal of hazardous and non-hazardous solid wastes. During the course of our operations, we generate
wastes (including, but not limited to, used oil, antifreeze, filters, paints and

5

 
solvents) in quantities regulated under RCRA. The EPA and various state agencies have limited the approved methods of disposal for these types of wastes.
CERCLA and analogous state laws and their implementing regulations impose strict, and under certain conditions, joint and several liability without regard
to fault or the legality of the original conduct on classes of persons who are considered to be responsible for the release of a hazardous substance into the
environment. These persons include current and past owners and operators of the facility or disposal site where the release occurred and any company that
transported, disposed of, or arranged for the transport or disposal of the hazardous substances released at the site. Under CERCLA, such persons may be
subject to joint and several liability for the costs of cleaning up the hazardous substances that have been released into the environment, for damages to
natural  resources  and  for  the  costs  of  certain  health  studies.  In  addition,  where  contamination  may  be  present,  it  is  not  uncommon  for  neighboring
landowners  and  other  third  parties  to  file  claims  for  personal  injury,  property  damage  and  recovery  of  response  costs  allegedly  caused  by  hazardous
substances or other pollutants released into the environment.

We currently own or lease, and in the past have owned or leased, a number of properties that have been used in support of our operations for a
number  of  years.  Although  we  have  utilized  operating  and  disposal  practices  that  were  standard  in  the  industry  at  the  time,  hydrocarbons,  hazardous
substances, or other regulated wastes may have been disposed of or released on or under the properties owned or leased by us or on or under other locations
where such materials have been taken for disposal by companies sub-contracted by us. In addition, some of these properties may have been previously
owned or operated by third parties whose treatment and disposal or release of hydrocarbons, hazardous substances or other regulated wastes was not under
our control. These properties and the materials released or disposed thereon may be subject to CERCLA, RCRA and analogous state laws. Under such
laws, we could be required to remove or remediate historical property contamination, or to perform certain operations to prevent future contamination. We
are not currently under any order requiring that we undertake or pay for any cleanup activities. However, we cannot provide any assurance that we will not
receive any such order in the future.

The Clean Water Act ("CWA") and the Oil Pollution Act of 1990 and implementing regulations govern:

•

•

the prevention of discharges, including oil and produced water spills, and

liability for drainage into waters.

The CWA and analogous state laws impose restrictions and strict controls with respect to the discharge of pollutants, including spills and leaks of
oil and other substances, into waters of the United States. The discharge of pollutants into regulated waters and wetlands is prohibited, except in accordance
with the terms of a permit issued by the EPA or an analogous state agency. The CWA also requires the development and implementation of spill prevention,
control and countermeasures to help prevent the contamination of navigable waters in the event of a petroleum hydrocarbon spill or leak at hydrocarbon
facilities. In addition, the CWA and analogous state laws require individual permits or coverage under general permits for discharges of storm water runoff
from certain types of facilities. Federal and state regulatory agencies can impose administrative, civil and criminal penalties as well as other enforcement
mechanisms  for  non-compliance  with  discharge  permits  or  other  requirements  of  the  CWA  and  analogous  state  laws  and  regulations.  Our compression
operations  do  not  generate  process  wastewaters  that  are  discharged  to  waters  of  the  U.S.  However,  the  operations  of  our  customers  may  generate  such
wastewaters subject to the CWA. While it is the responsibility of our customers to follow CWA regulations and obtain proper permits, violations of the
CWA may indirectly impact our operations in a negative manner.

Air Emissions

Our operations are also subject to federal, state, and local regulations. The Clean Air Act and implementing regulations and comparable state laws
and  regulations  regulate  emissions  of  air  pollutants  from  various  industrial  sources  and  also  impose  various  monitoring  and  reporting  requirements,
including  requirements  related  to  emissions  from  certain  stationary  engines,  such  as  those  on  our  compressor  units.  These  laws  and  regulations  impose
limits on the levels of various substances that may be emitted into the atmosphere from our compressor units and require us to meet more stringent air
emission standards and install new emission control equipment on all of our engines built after July 1, 2008.

For  instance,  in  2010,  the  U.S.  Environmental  Protection  Agency  (“EPA”)  published  new  regulations  under  the  CAA  to  control  emissions  of
hazardous  air  pollutants  from  existing  stationary  reciprocal  internal  combustion  engines.  In  2012,  the  EPA  proposed  amendments  to  the  final  rule  in
response to several petitions for reconsideration, which were finalized and became effective in 2013. The rule requires us to undertake certain expenditures
and  activities,  including  purchasing  and  installing  emissions  control  equipment  on  certain  compressor  engines  and/or  purchasing  certified  engines  from
complaint manufacturers.

6

 
 
 
In recent years, the EPA has lowered the National Ambient Air Quality Standard (“NAAQs”) for several air pollutants. For example, in 2013, the
EPA  lowered  the  annual  standard  for  fine  particulate  matter  from  15  to  12  micrograms  per  cubic  meter.  In  2015,  the  EPA  published  the  final  rule
strengthening the standards for ground level ozone, and the states are expected to establish revised attainment/non-attainment regions. State implementation
of  the  revised  NAAQS  could  result  in  stricter  permitting  requirements,  delay  or  prohibit  our  customers’  ability  to  obtain  such  permits,  and  result  in
increased  expenditures  for  pollution  control  equipment,  which  could  negatively  impact  our  customers’  operations  by  increasing  the  cost  of  additions  to
equipment, and negatively impact our business.

In 2012, the EPA finalized rules that establish new air emission controls for oil and natural gas production and natural gas processing operations.
Specifically, the EPA’s rule package included New Source Performance Standards to address emissions of sulfur dioxide and volatile organic compounds
(“VOCs”)  and  a  separate  set  of  emission  standards  to  address  hazardous  air  pollutants  frequently  associated  with  oil  and  natural  gas  production  and
processing activities. The rules established specific new requirements regarding emissions from compressors and controls at natural gas processing plants,
dehydrators, storage tanks and other production equipment as well as the first federal air standards for natural gas wells that are hydraulically fractured. The
EPA  has  taken  a  number  of  steps  to  amend  or  expand  on  these  regulations  since  2012.  For  example,  in  June  2016,  the  EPA  published  New  Source
Performance  Standards  that  require  certain  new,  modified  or  reconstructed  facilities  in  the  oil  and  natural  gas  sector  to  reduce  methane  gas  and  VOC
emissions. However, in a March 2017 executive order, President Trump directed the EPA to review the 2016 regulations and, if appropriate, to initiate a
rulemaking to rescind or revise them consistent with the stated policy of promoting clean and safe development of the nation’s energy resources, while at
the same time avoiding regulatory burdens that unnecessarily encumber energy production. In June 2017, the EPA published a proposed rule to stay for two
years  certain  requirements  of  the  2016  regulations,  including  fugitive  emission  requirements.    On  September  11,  2018,  the  EPA  proposed  targeted
improvements  to  the  rule,  including  amendments  to  the  rule's  fugitive  emissions  monitoring  requirements,  and  expects  to  "significantly  reduce"  the
regulatory burden of the rule in doing so. These standards, as well as any future laws and their implementing regulations, may impose stringent air permit
requirements, or mandate the use of specific equipment or technologies to control emissions. We cannot predict the final regulatory requirements or the cost
to comply with such requirements with any certainty.

We believe that our existing environmental control procedures are adequate and that we are in substantial compliance with environmental laws and
regulations, and the phasing in of emission controls and other known regulatory requirements should not have a material adverse affect on our financial
condition or operational results.  However, it is possible that future developments, such as new or increasingly strict requirements and environmental laws
and enforcement policies there under, could lead to material costs of environmental compliance by us.  While we may be able to pass on the additional cost
of complying with such laws to our customers, there can be no assurance that attempts to do so will be successful.  Some risk of environmental liability and
other costs are inherent in the nature of our business, however, and there can be no assurance that environmental costs will not rise. 

To the extent that new laws or other governmental actions restrict the energy industry or impose additional environmental protection requirements
that result in increased costs to the oil and gas industry, we could be adversely affected. We cannot determine to what extent our future operations and
earnings may be affected by new legislation, new regulations or changes in existing regulations.

Occupational Safety and Health 

We are subject to the requirements of Occupational Safety and Health Administration ("OSHA") and comparable state statutes. These laws and the
implementing  regulations  strictly  govern  the  protection  of  the  health  and  safety  of  employees.  The  OSHA  hazard  communication  standard,  the  EPA
community  right-to-know  regulations  under  Title  III  of  CERCLA,  and  similar  state  statutes  require  that  we  maintain  and/or  disclose  information  about
hazardous  materials  used  or  produced  in  our  operations.  We  believe  that  we  are  in  compliance  with  these  applicable  requirements  and  with  other
comparable laws.
Patents, Trademarks and Other Intellectual Property

We believe that the success of our business depends more on the technical competence, creativity and marketing abilities of our employees than on
any  individual  patent,  trademark,  or  copyright.    Nevertheless,  as  part  of  our  ongoing  research,  development  and  manufacturing  activities,  we  may  seek
patents when appropriate on inventions concerning new products and product improvements.  Although we continue to use technology that was previously
covered by a patent and consider it useful in certain applications, we do not consider the expired patent to be material to our business as a whole.

7

 
Suppliers and Raw Materials

Fabrication of our rental compressors involves the purchase by us of engines, compressors, coolers and other components, and the assembly of
these components on skids for delivery to customer locations.  These major components of our compressors are acquired through periodic purchase orders
placed with third-party suppliers on an "as needed" basis, which typically requires a three to six month lead time with delivery dates scheduled to coincide
with  our  estimated  production  schedules.   Although  we  do  not  have  formal  continuing  supply  contracts  with  any  major  supplier,  we  believe  we  have
adequate alternative sources available.  In the past, we have not experienced any sudden and dramatic increases in the prices of the major components for
our compressors.  However, the occurrence of such an event could have a material adverse effect on the results of our operations and financial condition,
particularly if we are unable to increase our rental rates and sale prices proportionate to any such component price increases.

In  addition,  the  COVID-19  outbreak  poses  the  risk  that  our  suppliers  may  be  prevented  from  conducting  their  business  at  sufficient  levels  to
provide us with necessary equipment and supplies in a timely and sufficient amount. We have experienced no supply disruptions nor have we received any
indications that our supplies will be disrupted during this early stage of the COVID-19 outbreak. Nevertheless, given that we are in the early stage of the
outbreak and the dynamic nature of these circumstances, we cannot reasonably predict or estimate the effects that the COVID-19 outbreak may have on our
supply  chain.  To  the  extent  we  have  difficulties  in  obtaining  needed  products  and  supplies  in  a  timely  manner,  our  results  of  operations  and  financial
position may be adversely affected.

Available Information

We use our website as a channel of distribution for Company information.  We make available free of charge on the Investor Relations section of
our website ( www.ngsgi.com ) our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, and Current Reports on Form 8-K.  We also make
available through our website other reports filed with or furnished to the SEC under the Securities Exchange Act of 1934, as amended, including our proxy
statements and reports filed by officers and directors under Section 16(a) of the Exchange Act, as well as our Code of Business Ethics and the charters to
our various Committees of our Board of Directors.   Paper copies of our filings are also available, without charge upon written request. Please mail requests
to Natural Gas Services Group, Inc., 404 Veterans Airpark Lane, Suite 300, Midland, TX 79705. The information contained on our website is not part of
this Report.

Glossary of Industry Terms

"CiP" - A branded gas compressor product line designed, manufactured and packaged by the Company. The 'Cylinder in Plane' design results in
a compact and vibration-free compressor unit that particularly lends itself to unconventional wellhead applications, air compression and compressed natural
gas requirements.

"flare" –  A tall stack equipped with burners used as a safety device at wellheads, refining facilities, gas processing plants, and chemical plants.
Flares are used for the combustion and disposal of combustible gases. The gases are piped to a remote, usually elevated, location and burned in an open
flame in the open air using a specially designed burner tip, auxiliary fuel, and steam or air. Combustible gases are flared most often due to emergency relief,
overpressure,  process  upsets,  startups,  shutdowns,  and  other  operational  safety  reasons.  Natural  gas  that  is  uneconomical  for  sale  is  also  flared.  Often
natural gas is flared as a result of the unavailability of a method for transporting such gas to markets.

"gas lift" – A production enhancement technique whereby natural gas is injected into an oil well to increase/improve the oil production.

"oil  shale"  –  Also  referred  to  as  tight  oil,  is  petroleum  that  consists  of  light  crude  oil  contained  in  petroleum-bearing  formations  of  low-

permeability, often shale or tight sandstone.

"reciprocating compressors" – A reciprocating compressor is a type of compressor which compresses vapor by using a piston in a cylinder and a

back-and-forth motion.

"screw  compressors"  –  A  type  of  compressor  used  in  low-pressure  and  vapor  compression  applications  where  two  intermesh  rotors  create

pockets of continuously decreasing volume, in which the gas is compressed and its pressure is increased.

8

ITEM 1A. RISK FACTORS

You should carefully consider the following risks associated with owning our common stock.  Although the risks described below are the risks that
we  believe  are  material,  they  are  not  the  only  risks  relating  to  our  industry,  our  business  and  our  common  stock.   Additional  risks  and  uncertainties,
including those that we have not yet identified or that we currently believe are immaterial, may also adversely affect our business, financial condition or
results of operations.

Risks Associated With Our Industry

The outbreak of COVID-19 and recent oil market developments could adversely impact our financial condition and results of operations.

On  January  30,  2020,  the  World  Health  Organization  (“WHO”)  announced  a  global  health  emergency  because  of  a  new  strain  of  coronavirus
known  as  COVID-19  due  to  the  risks  it  imposes  on  the  international  community  as  the  virus  spreads  globally.  In  March  2020,  the  WHO  classified  the
COVID-19 outbreak as a pandemic, based on the rapid increase in exposure globally. During this time, the market began to experience a decline in oil
prices  in  response  to  oil  demand  concerns  due  to  the  global  economic  impacts  of  COVID-19.  In  addition,  recent  events  concerning  OPEC  and  Russia
resulted in Saudi Arabia significantly discounting the price of its crude oil, as well as Saudi Arabia and Russia significantly increasing their oil supply.
These actions have led significant weakness in oil prices and ensuing reductions of E&P company capital and operating budgets. If economic and industry
conditions  do  not  improve,  these  events  will  adversely  impact  our  financial  condition  and  results  of  operations  in  2020  and  perhaps  beyond,  as  further
discussed in risk factors below.

In addition, the spread of the virus into our workforce could prevent us meeting the demands of our customers and adequately servicing existing
compressors. Similarly, if our customers or suppliers experience adverse business consequences due to COVID-19, demand for our equipment and services
could also be adversely affected. The magnitude and duration of potential social, economic and labor instability as a direct result of COVID-19 cannot be
estimated at this time. Should any of these potential impacts continue for an extended period of time, the impact on our business could have an adverse
effect on our financial position and results of operations.

Adverse macroeconomic and business conditions may significantly and negatively affect our results of operations.

As  a  result  of  the  COVID-19  outbreak  discussed  above  and  other  economic  conditions  in  the  United  States  and  abroad,  our  revenue  and
profitability  will  likely  be  adversely  affected.  The  condition  of  domestic  and  global  financial  markets,  relatively  low  oil  and  natural  gas  prices,  and  the
potential for disruption and illiquidity in the credit markets could have an adverse effect on our operating results and financial condition, and if sustained
for an extended period, such adverse effects could also become significant.  Uncertainty and turmoil in the credit markets may negatively impact the ability
of our customers to finance purchases of our products and services and could result in a decrease in, or cancellation of, orders included in our backlog or
adversely affect the collectability of our receivables. If the availability of credit to our customers is reduced, they may reduce their drilling and production
expenditures, thereby decreasing demand for our products and services, which could have a negative impact on our financial condition. A prolonged period
of depressed prices for oil and natural gas would likely result in delays or cancellation of projects by our customers, reducing the demand for our products
and services.

Decreased oil and natural gas prices and oil and gas industry expenditure levels adversely affect our revenue.

Our revenue is derived primarily from expenditures in the oil and natural gas industry, which, in turn, are based on budgets to explore for, develop
and produce oil and natural gas.  When these expenditures decline, as they have at various times during the past several years, our revenue will suffer.  The
industry’s  willingness  to  explore  for,  develop  and  produce  oil  and  natural  gas  depends  largely  upon  the  prevailing  view  of  future  oil  and  natural  gas
prices.  Prices for oil and natural gas historically have been, and are likely to continue to be, highly volatile.  Many factors affect the supply and demand for
oil and natural gas and, therefore, influence oil and natural gas prices, including:

•

•

•

•

the level of oil and natural gas production;

the level of oil and natural gas inventories;

domestic and worldwide demand for oil and natural gas;

the expected cost of developing new reserves;

9

•

•

•

•

•

•

•

•

•

•

•

the cost of producing oil and natural gas;

the level of drilling and completions activity;

inclement weather;

domestic and worldwide economic activity;

regulatory and other federal and state requirements in the United States;

the ability of the Organization of Petroleum Exporting Countries, national oil companies and other large producers to set and maintain production
levels and prices for oil;

political conditions in or affecting oil and natural gas producing countries;

terrorist activities in the United States and elsewhere;

the cost of developing alternate energy sources;

environmental regulation; and

tax policies.

Because of the recent significant reductions in the market prices of oil and natural gas, many companies developing oil and natural gas reserves
have curtailed or canceled their drilling programs, thereby reducing demand for our equipment and services.  Our rental contracts are generally short-term,
and oil and natural gas companies tend to respond quickly to upward or downward changes in prices.  Any prolonged reduction in drilling and production
activities historically has materially eroded both pricing and utilization rates for our equipment and services and adversely affects our financial results.  As
a  result  of  any  such  prolonged  reductions,  we  may  suffer  losses,  be  unable  to  make  necessary  capital  expenditures  and  be  unable  to  meet  our  financial
obligations.

The intense competition in our industry could result in reduced profitability and loss of market share for us.

We compete with the oil and natural gas industry’s largest equipment and service providers who have greater name recognition than we do.  These
companies  also  have  substantially  greater  financial  resources,  larger  operations  and  greater  budgets  for  marketing,  research  and  development  than  we
do.  They may be better able to compete because of their broader geographic dispersion and ability to take advantage of international opportunities, the
greater  number  of  compressors  in  their  fleet  or  their  product  and  service  diversity.    As  a  result,  we  could  lose  customers  and  market  share  to  those
competitors.  These companies may also be better positioned than us to successfully endure downturns in the oil and natural gas industry.

Our operations may be adversely affected if our current competitors or new market entrants introduce new products or services with better prices,
features,  performance  or  other  competitive  characteristics  than  our  products  and  services.    Competitive  pressures  or  other  factors  also  may  result  in
significant  price  competition  that  could  harm  our  revenue  and  our  business.    Additionally,  we  may  face  competition  in  our  efforts  to  acquire  other
businesses.

A reduction in demand for oil could adversely affect our business.

Our results of operations depend upon the level of activity in the energy market, including oil development, production, and transportation. Oil
and  natural  gas  prices  and  the  level  of  drilling  and  exploration  activity  can  be  volatile.  For  example,  oil  and  natural  gas  exploration  and  development
activity and the number of well completions typically decline when there is a significant reduction in oil and natural gas prices such as have occurred in the
first quarter of 2020. As a result, the demand for our natural gas compression services will be adversely affected. A reduction in demand could also force us
to  reduce  our  pricing  substantially.  Additionally,  our  customers’  production  from  oil-weighted  reserves  constitutes  the  majority  percentage  of  our
business.  These unconventional sources are generally less economically feasible to be developed in low oil price environments. A decline in demand for
oil and natural gas generally has an adverse effect on our business, financial condition and results of operations.

Our industry is highly cyclical, and our results of operations may be volatile.

Our industry is highly cyclical, with periods of high demand and high pricing followed by periods of low demand and low pricing.  Periods of low
demand intensify the competition in the industry and often result in rental equipment being idle for long periods of time. We have been required to enter
into lower rate rental contracts in response to market conditions and our rentals and sales revenue have decreased as a result of such conditions. Due to the
short-term nature of most of our rental

10

 
contracts, changes in market conditions can quickly affect our business.  As a result of the cyclicality of our industry, we anticipate our results of operations
will be volatile in the future.

Increased regulation or ban of current fracturing techniques could reduce demand for our compressors.

From time to time, for example, legislation has been proposed in Congress to amend the federal Safe Drinking Water Act (“SDWA”) to require
federal  permitting  of  hydraulic  fracturing  and  the  disclosure  of  chemicals  used  in  the  hydraulic  fracturing  process.  Further,  the  EPA  completed  a  study
finding that hydraulic fracturing could potentially harm drinking water resources under adverse circumstances such as injection directly into groundwater
or  into  production  wells  lacking  mechanical  integrity.  Further,  legislation  to  amend  the  SDWA  to  repeal  the  exemption  for  hydraulic  fracturing  (except
when diesel fuels are used) from the definition of “underground injection” and require federal permitting and regulatory control of hydraulic fracturing, as
well as legislative proposals to require disclosure of the chemical constituents of the fluids used in the fracturing process, have been proposed in recent
sessions  of  Congress.  Several  states  and  local  jurisdictions  also  have  adopted  or  are  considering  adopting  regulations  that  could  restrict  or  prohibit
hydraulic  fracturing  in  certain  circumstances,  impose  more  stringent  operating  standards  and/or  require  the  disclosure  of  the  composition  of  hydraulic
fracturing fluids.

More recently, federal and state governments have begun investigating whether the disposal of produced water into underground injection wells
has caused increased seismic activity in certain areas. The results of these studies could lead federal and state governments and agencies to develop and
implement additional regulations.

A ban of hydraulic fracturing would likely halt some projects, including unconventional projects, at least temporarily. Expanded regulations are
likely  to  introduce  a  period  of  uncertainty  as  companies  determine  ways  to  proceed.   Any  curtailment  could  result  in  a  reduction  of  demand  for  our
compressors, potentially affecting both sales and rentals of our units.

We are subject to extensive environmental laws and regulations that could require us to take costly compliance actions that could harm our financial
condition.

Our  fabrication  and  maintenance  operations  are  significantly  affected  by  stringent  and  complex  federal,  state  and  local  laws  and  regulations
governing the discharge of substances into the environment or otherwise relating to environmental protection.  In these operations, we generate and manage
hazardous  wastes  such  as  solvents,  thinner,  waste  paint,  waste  oil,  wash  down  wastes,  and  sandblast  material.    We  attempt  to  use  generally  accepted
operating  and  disposal  practices  and,  with  respect  to  acquisitions,  will  attempt  to  identify  and  assess  whether  there  is  any  environmental  risk  before
completing an acquisition.  Based on the nature of the industry, however, hydrocarbons or other wastes may have been disposed of or released on or under
properties owned or leased by us or on or under other locations where such wastes have been taken for disposal.  The waste on these properties may be
subject to federal or state environmental laws that could require us to remove the wastes or remediate sites where they have been released.  We could be
exposed  to  liability  for  cleanup  costs,  natural  resource  and  other  damages  as  a  result  of  our  conduct  or  the  conduct  of,  or  conditions  caused  by,  prior
owners, lessees or other third parties.  Environmental laws and regulations have changed in the past, and they are likely to change in the future.  If current
existing regulatory requirements or enforcement policies change, we may be required to make significant unanticipated capital and operating expenditures.

Any failure by us to comply with applicable environmental laws and regulations may result in governmental authorities taking actions against our

business that could harm our operations and financial condition, including the:

•

•

•

•

issuance of administrative, civil and criminal penalties;

denial or revocation of permits or other authorizations;

reduction or cessation in operations; and

performance of site investigatory, remedial or other corrective actions.

Risks Associated With Our Company

A majority of our compressor rentals are for terms of six months or less which, if terminated or not renewed, would adversely impact our revenue and
our ability to recover our initial equipment costs.

The length of our compressor rental agreements with our customers varies based on customer needs, equipment configurations and geographic
area.  In most cases, under currently prevailing rental rates, the initial rental periods are not long enough to enable us to fully recoup the average cost of
acquiring or fabricating the equipment.  Of the 1,419 compressors rented

11

 
at December 31, 2019, 953 were rented on a month-to-month basis. Given the current oil and gas price environment, we cannot be sure that a substantial
number  of  our  customers  will  continue  to  renew  their  rental  agreements  or  that  we  will  be  able  to  re-rent  the  equipment  to  new  customers  or  that  any
renewals or re-rentals will be at comparable rental rates.  The inability to timely renew or re-rent a substantial portion of our compressor rental fleet has and
will have a material adverse effect upon our business, financial condition, results of operations and cash flows.

We could be subject to substantial liability claims that could harm our financial condition.

Our products are used in production applications where an accident or a failure of a product can cause personal injury, loss of life, damage to
property,  equipment  or  the  environment,  or  suspension  of  operations.  While  we  maintain  insurance  coverage,  we  face  the  following  risks  under  our
insurance coverage:

• we may not be able to continue to obtain insurance on commercially reasonable terms;

• we may be faced with types of liabilities that will not be covered by our insurance, such as damages from significant product liabilities and from

environmental contamination;

•

the dollar amount of any liabilities may exceed our policy limits; and

• we do not maintain coverage against the risk of interruption of our business.

Any claims made under our policies will likely cause our premiums to increase.  Any future damages caused by our products or services that are
not  covered  by  insurance,  are  in  excess  of  policy  limits  or  are  subject  to  substantial  deductibles,  would  reduce  our  earnings  and  our  cash  available  for
operations.

The loss of one or more of our current customers could adversely affect our results of operations.

Our business is dependent not only on securing new customers but also on maintaining current customers. We had one customer that accounted
for  an  aggregate  of  approximately  36%  of  our  revenue  for  the  year  ended  December  31,  2019,  and  the  same  customer  accounted  for  an  aggregate  of
approximately 28% of our revenue for the year ended December 31, 2018.  At December 31, 2019, one customer accounted for an aggregate of 35% of our
accounts receivable. Unless we are able to retain our existing customers, or secure new customers if we lose one or more of our significant customers, our
revenue and results of operations would be adversely affected. In addition, the default on payments by one or more of these significant customers may
negatively impact our cash flow and current assets.

Loss of key members of our management could adversely affect our business.

In  keeping  with  our  streamlined  approach  to  our  business,  our  executive  management  team  consists  of  three  officers:  our  (i)  Chief  Executive
Officer, (ii) Chief Financial Officer and (iii) Vice President of Technical Services. We depend on the continued employment and performance of these three
key members of our executive management team. In particular, we are significantly reliant upon the leadership and guidance of Stephen C. Taylor, who has
been our President, Chief Executive Officer and Board member since 2004. In addition to his management duties, Mr. Taylor has been instrumental in our
communications and standing with the investment community. If any of our key executives resign or become unable to continue in his present role and is
not adequately replaced, our business operations could be materially adversely affected.  We do not carry any key-man insurance on any of our officers or
directors.

The erosion of the financial condition of our customers could adversely affect our business.

Many of our customers finance their exploration and development activities through cash flow from operations, the incurrence of debt or the
issuance of equity. During times when the oil or natural gas markets are weak, such as now, our customers are more likely to experience a downturn in their
financial condition. Many of our customers’ equity values and liquidity substantially declined during the most recent fall in oil and natural gas prices, and
in some cases access to capital markets may be an unreliable source of financing for some customers. The combination of a reduction in cash flow resulting
from  declines  in  commodity  prices,  a  reduction  in  borrowing  bases  under  reserve-based  credit  facilities  and  the  lack  of  availability  of  debt  or  equity
financing may result in a reduction in our customers’ spending for our products and services in 2020. For example, our customers could seek to preserve
capital  by  canceling  month-to-month  contracts,  canceling  or  delaying  scheduled  maintenance  of  their  existing  natural  gas  compression  equipment  or
determining not to enter into any new natural gas compression service contracts or purchase new compression equipment.

12

 
We might be unable to employ qualified technical personnel, which could hamper our present operations or increase our costs.

Many of the compressors that we sell or rent are mechanically complex and often must perform in harsh conditions.  We believe that our success
depends upon our ability to employ and retain a sufficient number of technical personnel who have the ability to design, utilize, enhance and maintain these
compressors.  Our ability to maintain and expand our operations depends in part on our ability to utilize and increase our skilled labor force.  The demand
for skilled workers is high, and supply is limited.  A significant increase in the wages paid by competing employers could result in a reduction of our skilled
labor force or cause an increase in the wage rates that we must pay or both.  If either of these events were to occur, our cost structure could increase and our
operations and growth potential could be impaired.

We may require a substantial amount of capital to expand our compressor rental fleet and grow our business.

During 2020, the amount we will spend on capital expenditures related to rental compression equipment will be determined primarily by the
activity of our customers. The amount and timing of any capital expenditures may vary depending on a variety of factors, including the level of activity in
the  oil  and  natural  gas  exploration  and  production  industry  and  the  presence  of  alternative  uses  for  our  capital,  including  any  acquisitions  that  we  may
pursue.

Historically, we have funded our capital expenditures through cash flows from operations and borrowings under bank credit facilities. Although
we believe that cash on hand, cash flows from our operations and/or bank borrowing from our line of credit will provide us with sufficient cash to fund our
planned capital expenditures for 2020, we cannot assure you that these sources will be sufficient.  We may require additional capital to fund any significant
unanticipated capital expenditures, such as a material acquisition. To the extent we would require any necessary capital, it may not be available to us when
we need it or on acceptable terms.  Our ability to raise additional capital will depend on the results of our operations and the status of various capital and
industry markets at the time we seek such capital.  Failure to generate sufficient cash flow, together with the absence of alternative sources of capital, could
have a material adverse effect on our business, financial condition, results of operations or cash flow.

Of  our  $30.0  million  line  of  credit,  we  owe  $417,000  as  of  December  31,  2019.    All  outstanding  principal  and  unpaid  interest  is  due  on
December 31, 2020.  Although we believe that we will be able to renew our existing line of credit, or obtain a new line of credit with another lender, we can
provide no assurance that we will be successful in renewing our line of credit or obtaining a new line.  In addition, any renewal of our existing line of credit
or creation of a new line of credit may be on terms less favorable that our existing line.  For instance, changes in the terms of a new line of credit may
include,  but  not  be  limited  to:    a  reduction  in  the  borrowing  amount,  an  increase  in  interest  rate  to  be  paid  on  borrowings  under  the  line,  or  restrictive
covenants that are more onerous than those on our existing line of credit.

Uncertainty relating to the LIBOR calculation process and potential phasing out of LIBOR after 2021 may adversely affect the market value of our
current or future debt obligations

Our  variable  rate  debt  is  tied  to  the  benchmark  LIBOR.  LIBOR  is  calculated  by  reference  to  a  market  for  interbank  lending,  and  it's  based  on
increasingly fewer actual transactions. This increases the subjectivity of the LIBOR calculation process and increases the risk of manipulation. Actions by
the regulators or law enforcement agencies, as well as ICE Benchmark Administration (the current administrator of LIBOR), may result in changes to the
manner that LIBOR is determined or the establishment of alternative reference rates. For example, on July 27, 2017, the U.K. Financial Conduct Authority
announced that it intends to stop persuading or compelling banks to submit LIBOR rates after 2021.

U.S. Dollar LIBOR will likely be replaced by the Secured Overnight Financing Rate (“SOFR”) published by the Federal Reserve Bank of New
York; however, the timing of this shift is currently unknown. SOFR is an overnight rate instead of a term rate, making SOFR an inexact replacement for
LIBOR, and there is not an established process to create robust, forward-looking, SOFR term rates. Changing the benchmark rate for our debt instruments
from  LIBOR  to  SOFR  requires  calculations  of  a  spread.  Industry  organizations  are  attempting  to  structure  the  spread  calculation  in  a  manner  that
minimizes the possibility of value transfer between counterparties, borrowers, and lenders by the transition, but there is no assurance that the calculated
spread will be fair and accurate. At this time, it is not possible to predict the effect of any such changes, any establishment of alternative reference rates or
any other reforms to LIBOR that may be implemented. If LIBOR ceases to exist, we may need to renegotiate our line of credit to determine the interest rate
to  replace  LIBOR  with  the  new  standard  that  is  established.  As  such,  the  potential  effect  of  any  such  event  on  our  interest  expense  cannot  yet  be
determined.

13

Our debt levels may negatively impact our current and future financial stability.

Should we utilize our full debt capacity, growth beyond that point could be impacted. As a result of our  indebtedness at any given point in time,
we might not have the ability to incur any substantial additional indebtedness.  The level of our indebtedness could have several important effects on our
future operations, including:

•

•

•

our ability to obtain additional financing for working capital, acquisitions, capital expenditures and other purposes may be limited;

a significant portion of our cash flow from operations may be dedicated to the payment of principal and interest on our debt, thereby reducing
funds available for other purposes; and

our leverage if increased to an unacceptable level, could make us more vulnerable to economic downturns.

If we are unable to service our debt, we will likely be forced to take remedial steps that are contrary to our business plan.

As of December 31, 2019, we had $417,000 due under our Line of Credit agreement which allows us to borrow up to $30.0 million provided we
maintain certain collateral and borrowing base requirements. We believe that our current cash position and the amount available under the current line of
credit are sufficient to meet our capital needs through 2020. However, if we were to materially increase our borrowings, it is possible that our business will
not generate sufficient cash flow from operations to meet our debt service requirements and the payment of principal when due depending on the amount of
borrowings on the agreement at any given time.  If this were to occur, we may be forced to:

•

•

•

sell assets at disadvantageous prices;

obtain additional financing; or

refinance all or a portion of our indebtedness on terms that may be less favorable to us.

Our current credit agreement contains covenants that limit our operating and financial flexibility and, if breached, could expose us to severe remedial
provisions.

Under the terms of our credit agreement, we must:

•

•

•

•

comply with a minimum leverage ratio;

comply with a commitment coverage ratio;

not exceed specified levels of debt; and

comply with limits on asset sales.

Our ability to meet the financial ratios and tests under our credit agreement can be affected by events beyond our control, and we may not be able
to satisfy those ratios and tests.  A breach of any one of these covenants could permit the bank to accelerate the debt so that it is immediately due and
payable.  If a breach occurred, no further borrowings would be available under our credit agreement.  If we were unable to repay the debt, the bank could
proceed against and foreclose on our assets, substantially all of which have been pledged as collateral to secure payment of our indebtedness.

If we fail to acquire or successfully integrate additional businesses, our growth may be limited and our results of operations may suffer.

As part of our business strategy, we evaluate potential acquisitions of other businesses or assets.  However, there can be no assurance that we
will be successful in consummating any such acquisitions.  Successful acquisition of businesses or assets will depend on various factors, including, but not
limited to, our ability to obtain financing and the competitive environment for acquisitions.  In addition, we may not be able to successfully integrate any
businesses  or  assets  that  we  acquire  in  the  future.    The  integration  of  acquired  businesses  is  likely  to  be  complex  and  time  consuming  and  place  a
significant strain on management and may disrupt our business.  We also may be adversely impacted by any unknown liabilities of acquired businesses,
including environmental liabilities.  We may encounter substantial difficulties, costs and delays involved in integrating common accounting, information
and communication systems, operating procedures, internal controls and human resources practices, including incompatibility of business cultures and the
loss of key employees and customers.  These difficulties may reduce our ability to gain customers or retain existing customers, and may increase operating
expenses, resulting in reduced revenues and income and a failure to realize the anticipated benefits of acquisitions.

14

Failure to effectively manage our business and growth could adversely affect our operating results and our internal controls.

Our strategy envisions the expansion and growth of our business, subject to the demand for oil and gas and the impact of the other risks set forth in
this risk factor section and elsewhere in this Report. Growth may place a strain on our management systems and resources. We must continue to refine and
expand our business capabilities, our systems and processes, and our access to financing sources. If we expand, we must continue to hire, train, supervise
and manage new employees. We cannot assure that we will be able to:

• meet our capital needs;

•

•

•

upgrade and expand our office and manufacturing infrastructure so that it is appropriate for our level of activity;

expand our systems effectively or efficiently or in a timely manner, including financial and management controls, reporting systems and
procedures; and

attract, hire, train and retain additional highly skilled and motivated officers and employees and allocate our human resources optimally.

If we are unable to manage our growth, our financial conditions and results of operations may be adversely affected.

Liability to customers under warranties and indemnification provisions may materially and adversely affect our results of operations.

We provide warranties as to the proper operation and conformance to specifications of the equipment we manufacture.  Our equipment is complex
and  often  deployed  in  harsh  environments.    Failure  of  this  equipment  to  operate  properly  or  to  meet  specifications  may  increase  our  costs  by  requiring
additional engineering resources and services, replacement of parts and equipment or monetary reimbursement to a customer.  We have in the past received
warranty  claims  and  we  expect  to  continue  to  receive  them  in  the  future.    To  the  extent  that  we  incur  substantial  warranty  claims  in  any  period,  our
reputation, our ability to obtain future business and our results of operations could be materially and adversely affected.

Our rental and sales contracts provide for varying forms of indemnification from our customers and in most cases may require us to indemnify our
customers. Under some of our rental and sales contracts, liability with respect to personnel and property is customarily assigned on a “knock-for-knock”
basis, which means that we and our customers assume liability for our respective personnel and property.  However, in certain rental and sales contracts we
assume  liability  for  damage  to  our  customer’s  property  and  other  third-party  on  the  site  resulting  from  our  negligence.    Since  our  products  are  used  in
production applications in the energy industry, expenses and liabilities in connection with accidents involving our products and services could be extensive
and may exceed our insurance coverages.

Our income taxes may change.

We are subject to income tax on a jurisdictional or legal entity basis and significant judgment is required in certain instances to allocate our taxable
income to a jurisdiction and to determine the related income tax expense and benefits. Losses in one jurisdiction generally may not be used to offset profits
in other jurisdictions. As a result, changes in the mix of our earnings (or losses) between jurisdictions, among other factors, could alter our overall effective
income tax rate, possibly resulting in significant tax rate increases.

We are regularly audited by various tax authorities. Income tax audit assessments or changes in tax laws, regulations, or other interpretations may
result in increased tax provisions which could materially affect our operating results in the period or periods in which such determinations are made or
changes occur.

Failure to maintain effective internal controls could have a material adverse effect on our operations.

Section  404  of  the  Sarbanes-Oxley  Act  requires  annual  management  assessments  of  the  effectiveness  of  our  internal  control  over  financial
reporting.  During this assessment for the year ended December 31, 2018, management noted a If we fail to maintain effective internal controls, we may not
be able to ensure that we can conclude on an ongoing basis that we have effective internal controls over financial reporting in accordance with Section 404
of the Sarbanes-Oxley Act.  Moreover, effective internal controls are necessary for us to produce reliable financial reports and to help prevent financial
fraud.  If, as a

15

 
 
 
result of deficiencies in our internal controls, we cannot provide reliable financial reports or prevent fraud, our business decision process may be adversely
affected, our business and operating results could be harmed, investors could lose confidence in our reported financial information, and the price of our
stock could decrease as a result.

In its Section 404 assessments, management has noted a material weakness in internal control over financial reporting in each of the prior two
years. During the year ended December 31, 2018, management noted a material weakness related to our accounting and reporting of income taxes. During
the  year  ended  December  31,  2019,  management  noted  another  material  weakness  related  to  our  accounting  and  reporting  of  compressor  "make-ready"
jobs,  as  well  as  various  other  compressor  maintenance  jobs,  that  were  not  recorded  in  a  timely  manner.  Please  see  Item  9A,  Controls  and  Procedures,
Material Weaknesses in Internal Control over Financial Reporting. If management does not remediate these weaknesses in a timely manner, our business
could be adversely affected and the price of our stock could decrease as a result.

We are exposed to risks related to Computer systems failures or cyber security threats

In the conduct of our business we are dependent upon our computing systems and those of third parties to collect, store, transmit and process data
used in our operational activities and to record, process and track financial transactions. If interruptions were to occur we would be unable to access these
systems for a period of time and there is a risk of data loss. Data backup and storage measures are in place that would allow recovery in a time frame that
we believe would not materially impact our ability to conduct business.

We are also subject to cyber security attacks and have taken steps to minimize the probability of an attack penetrating our systems. These include
network security, virus protection, filtering software and intrusion protection measures. While an attack could potentially disrupt our activity, we do not
house sensitive data that would affect the privacy of our customers, employees or business partners.

Risks Associated With Our Common Stock

The price of our common stock may fluctuate.

The trading price of our common stock and the price at which we may sell securities in the future are subject to substantial fluctuations in response
to  various  factors,  including  our  ability  to  successfully  accomplish  our  business  strategy,  the  trading  volume  of  our  stock,  changes  in  governmental
regulations, actual or anticipated variations in our quarterly or annual financial results, our involvement in litigation, general market conditions, the prices
of oil and natural gas, announcements by us and our competitors, our liquidity, our ability to raise additional funds, and other events such as those discussed
in the factors above.

Future sales of our common stock could adversely affect our stock price.

Substantial sales of our common stock in the public market, or the perception by the market that those sales could occur, may lower our stock

price or make it difficult for us to raise additional equity capital in the future. According to filings made with the Securities and Exchange Commission in
February 2020, an aggregate of approximately 39.8% of the outstanding shares of our common stock are owned by six institutional investors, each of
which owns more than 5% of our outstanding shares as of the date of their respective filings in February 2020. Potential sales of large amounts of these
shares in a short period of time by one or more of these significant investors could have a negative impact on our stock price. In addition, potential sales of
our common stock by our directors and officers, who beneficially own approximately 6.6% of the outstanding shares of our common stock as of March 27,
2020, and because of the negative perception of sales by insiders, could also have a negative impact on our stock price.

We have a comparatively low number of shares of common stock outstanding and, therefore, our common stock may suffer from limited liquidity and
its prices will likely be volatile and its value may be adversely affected.

Because of our relatively low number of outstanding shares of common stock, the trading price of our common stock will likely be subject to
significant price fluctuations and limited liquidity.  This may adversely affect the value of your investment.  In addition, our common stock price could be
subject to fluctuations in response to variations in quarterly operating results, changes in management, future announcements concerning us, general trends
in the industry and other events or factors such as those described above.

16

     
If we issue debt or equity securities, you may lose certain rights and be diluted.

If  we  raise  funds  in  the  future  through  the  issuance  of  debt  or  equity  securities,  the  securities  issued  may  have  rights  and  preferences  and
privileges  senior  to  those  of  holders  of  our  common  stock,  and  the  terms  of  the  securities  may  impose  restrictions  on  our  operations  or  dilute  your
ownership in our Company.

If securities analysts downgrade our stock or cease coverage of us, the price of our stock could decline.

The trading market for our common stock relies in part on the research and reports that industry or financial analysts publish about us or our
business.   We  do  not  control  these  analysts.    Furthermore,  there  are  many  large,  well-established,  publicly  traded  companies  active  in  our  industry  and
market, which may mean that it is less likely that we will receive widespread analyst coverage.  If one or more of the analysts who do cover us downgrade
our stock, our stock price would likely decline rapidly.  If one or more of these analysts cease coverage of our company, we could lose visibility in the
market, which in turn could cause our stock price to decline.

Provisions contained in our governing documents could hinder a change in control of us.

Our articles of incorporation and bylaws contain provisions that may discourage acquisition bids and may limit the price investors are willing to

pay for our common stock.  Our articles of incorporation and bylaws provide that:

•

•

•

•

directors are elected for three-year terms, with approximately one-third of the board of directors standing for election each year;

cumulative voting is not allowed, which limits the ability of minority shareholders to elect any directors;

the unanimous vote of the board of directors or the affirmative vote of the holders of not less than 80% of the votes entitled to be cast by the
holders of all shares entitled to vote in the election of directors is required to change the size of the board of directors; and

directors may be removed only for cause or by the holders of not less than 80% of the votes entitled to be cast on the matter.

Our  Board  of  Directors  has  the  authority  to  issue  up  to  five  million  shares  of  preferred  stock.  The  Board  of  Directors  can  fix  the  terms  of  the
preferred  stock  without  any  action  on  the  part  of  our  shareholders.  The  issuance  of  shares  of  preferred  stock  may  delay  or  prevent  a  change  in  control
transaction. In addition, preferred stock could be used in connection with the Board of Directors’ adoption of a shareholders’ rights plan (also known as a
poison pill), which would make it much more difficult to effect a change in control of our Company through acquiring or controlling blocks of stock.  Also,
our directors and officers as a group will continue to beneficially own stock and although this is not a majority of our stock, it confers substantial voting
power  in  the  election  of  directors  and  management  of  our  Company. This  would  make  it  difficult  for  other  minority  shareholders  to  effect  a  change  in
control or otherwise extend any significant control over our management. This may adversely affect the market price and interfere with the voting and other
rights of our common stock.

ITEM 1B. UNRESOLVED STAFF COMMENTS

None.

17

ITEM 2. PROPERTIES

The table below describes the material facilities owned or leased by Natural Gas Services Group as of December 31, 2019:

Location

Status

Square Feet

Uses

Tulsa, Oklahoma

Midland, Texas

Lewiston, Michigan

Midland, Texas

Bloomfield, New Mexico

Godley, Texas

Galeton, Colorado

Bridgeport, Texas

Midland, Texas

Vernal, Utah

Carrollton, Ohio

Wheeler, Texas

Grapevine, Texas

Owned and Leased

91,780    Compressor fabrication, rental and services

Owned

Owned

Owned

Owned

Leased

Leased

Leased

Owned

Leased

Leased

Leased

Leased

70,000    Compressor fabrication, rental and services

15,360    Compressor fabrication, rental and services

45,000    Corporate office

7,000    Office and parts and services

5,000    Parts and services

4,800    Parts and services

4,500    Office and parts and services

4,100    Parts and services

3,200    Parts and services

2,600    Parts and services

2,160    Parts and services

800    Sales

We believe that our properties are generally well maintained and in good condition and adequate for our purposes.

ITEM 3. LEGAL PROCEEDINGS

From time to time, we are a party to various legal proceedings in the ordinary course of our business.  While management is unable to predict
the  ultimate  outcome  of  these  actions,  it  believes  that  any  ultimate  liability  arising  from  these  actions  will  not  have  a  material  effect  on  our  financial
position, results of operations or cash flow.  We are not currently a party to any bankruptcy, receivership, reorganization, adjustment or similar proceeding,
and we are not aware of any threatened litigation.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

18

 
 
 
 
 
 
 
ITEM 5. MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND

ISSUER PURCHASES OF EQUITY SECURITIES

PART II

Our common stock currently trades on the New York Stock Exchange under the symbol “NGS”. As of December 31, 2019  as reflected by our
transfer agent records, we had 16 record holders of our common stock.  This number does not include any beneficial owners for whom shares of common
stock may be held in “nominee” or “street” name. On March 27, 2020, the last reported sale price of our common stock as reported by the New York Stock
Exchange was $4.75 per share.

  The  following  graph  shows  a  five  year  comparison  of  the  cumulative  total  stockholder  return  on  our  common  stock  as  compared  to  the
cumulative total return of two other indexes:  a custom composite index of the Philadelphia Oil Service Index and the Standard & Poor’s 500 Composite
Stock Price Index.  These comparisons assume an initial investment of $100 and the reinvestment of dividends.

The performance graph shall not be deemed incorporated by reference by any general statement incorporating by reference this Annual Report on
Form 10-K into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934, except to the extent that we specifically incorporate this
information by reference, and shall not otherwise be deemed filed under those Acts.

Dividends

To  date,  we  have  not  declared  or  paid  any  dividends  on  our  common  stock.  We  currently  do  not  anticipate  paying  a  cash  dividend  on  our
common stock.  Although we intend to retain our earnings, if any, to finance the growth of our business, our Board of Directors will have the discretion to
declare and pay dividends in the future. Payment of dividends in the future will depend upon our earnings, capital requirements, and other factors, which
our Board of Directors may deem relevant.  Our credit agreement also contains restrictions on our paying dividends under certain circumstances.

19

Equity Compensation Plans

The following table summarizes certain information regarding our equity compensation plans as of December 31, 2019:

Equity compensation plans approved by security holders:

Plan Category

Stock Option Plan
Restricted Stock / Unit Plan (2)
2019 Equity Incentive Plan

Total

(a)
Number of securities to
vest or be issued upon
exercise of outstanding
options

(b)
Weighted-average
issuance or exercise
price of
outstanding options

(c)
Number of securities
remaining available for
future issuance under
equity compensation
plans
(excluding securities
reflected in column
(a))

208,334   

(1)

123,092   

156,674   

488,100   

  $
$

$

23.67   

23.99   

17.13   

337,503   

—   

328,173   

665,676   

(1) Total number of shares to be issued upon exercise of options granted to employees, officers, and directors under our 1998 Stock Option Plan.

(2)  The Restricted Stock/Unit Plan expired on June 20, 2019. The outstanding shares/units as of December 31, 2019, will vest over the next two years.

Stock Repurchase Program

On  August  12,  2019,  the  Company  announced  the  Board  of  Directors  had  authorized  the  repurchase  of  up  to  $10.0  million  of  its  outstanding
shares of common stock in the open market, block trades or privately negotiated transactions. The timing and extent of any repurchase is subject to the
discretion  of  management  and  is  dependent  upon  market  pricing  and  conditions,  business,  legal,  accounting  and  other  considerations.  The  repurchase
program does not obligate the Company to purchase any shares and will expire on September 30, 2020, subject to earlier termination of the program by the
Board of Directors. The repurchase program may be modified, suspended or terminated at any time without notice, in the Company’s discretion, based
upon a number of factors, including market conditions, the cost of repurchasing shares, the availability of alternative investment opportunities, liquidity, the
need for capital in the Company’s operations and other factors deemed appropriate. The Company intends to finance the repurchases with existing liquidity
and free cash flow. As of December 31, 2019, the Company repurchased 37,936 of its outstanding shares of common stock with a value of $490,000, at an
average price of $12.91. No repurchases were made during the fourth quarter of 2019. As of December 31, 2019, the Company had approximately $9.5
million remaining under the repurchase authorization.

Sale of Unregistered Securities

We made no sales of unregistered securities during the year ended December 31, 2019.

20

 
 
 
 
 
 
 
 
 
 
ITEM 6.  SELECTED FINANCIAL DATA

In  the  table  below,  we  provide  you  with  selected  historical  financial  data.    We  have  derived  this  information  from  our  audited  financial
statements for each of the years in the five-year period ended December 31, 2019.  In the table we also present non-GAAP financial measures, Adjusted
EBITDA and Adjusted Gross Margin, which we use in our business. These measures are not calculated or presented in accordance with GAAP. We explain
these measures below and reconcile them to the most directly comparable financial measure calculated and presented in accordance with GAAP in "Non-
GAAP  Financial  Measures."  This  information  is  only  a  summary  and  it  is  important  that  you  read  this  information  along  with  our  audited  financial
statements and related notes and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” under Item 7 below, which
discusses factors affecting the comparability of the information presented.  

The selected financial information provided is not necessarily indicative of our future results of operations or financial performance.

STATEMENTS OF OPERATIONS AND OTHER
INFORMATION:

Revenues
Costs of revenues, exclusive of depreciation and amortization

shown separately below

Selling, general and administrative expenses

Depreciation and amortization

Impairment of goodwill

Inventory allowance

Retirement of rental equipment

Operating (loss) income

Total other income, net

(Loss) Income before income taxes

Income tax benefit (expense)

Net (loss) income

(Loss) earnings per share:

Basic

Diluted

Weighted average shares outstanding:

Basic

Diluted

Adjusted EBITDA(1)
Adjusted gross margin (2)
Cash flows from:

Operating Activities

Investing Activities

Financing Activities

Net change in cash and cash equivalents

Year Ended December 31,

2019

2018

2017

2016

2015

(in thousands, except per share amounts)

$

78,444    $

65,478    $

67,693    $

71,654    $

95,919   

44,310   

10,710   

23,268   

10,039   

3,758   

1,512   

(15,153)  

596   

(14,557)  

693   

34,809   

9,096   

22,080   

—   

—   

—   

(507)  

113   

(394)  

(72)  

34,552   

10,081   

21,316   

—   

273   

—   

1,471   

36   

1,507   

18,287   

31,306   

9,011   

21,796   

—   

566   

545   

8,430   

35   

8,465   

(1,996)  

(13,864)   $

(466)   $

19,794    $

6,469    $

42,450   

10,989   

22,758   

—   

205   

4,370   

15,147   

117   

15,264   

(5,117)  

10,147   

(1.06)   $

(1.06)   $

(0.04)   $

(0.04)   $

1.54    $

1.51    $

0.51    $

0.50    $

0.81   

0.79   

13,114   

13,114   

24,035    $

34,134    $

12,965   

12,965   

21,755    $

30,669    $

12,831   

13,110   

23,110    $

33,141    $

12,702   

12,935   

31,380    $

40,348    $

29,412    $

23,689    $

17,499    $

31,785    $

(70,175)  

(273)  

(40,285)  

(12,838)  

16   

453   

(3,414)  

191   

12,567   

12,793   

42,612   

53,469   

41,566   

(12,270)  

55   

(41,036)   $

(16,580)   $

5,114    $

28,562    $

29,351   

$

$

$

$

$

$

$

21

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
BALANCE SHEET INFORMATION:

Current assets

Total assets

2019

2018

2017 (3)
(in thousands)

2016

2015

$

42,415    $

94,921    $

108,143    $

95,359    $

286,577   

304,200   

298,260   

293,524   

68,074   

285,553   

417   

Long-term debt (including current portion)

417   

417   

417   

417   

Stockholders’ equity

247,693   

259,232   

257,262   

232,954   

223,981   

(1) Adjusted EBITDA is defined, reconciled to net income and discussed immediately  below under “Non-GAAP Financial Measures.”

(2) Adjusted Gross Margin is defined, reconciled to operating income and discussed immediately below under "Non-GAAP Financial Measures."

(3) As disclosed in Notes 2, 17 and 18 to our consolidated financial statements, we revised certain prior period financial information to reflect additional,
immaterial operating costs and expenses. The impact of these revisions on our balance sheet for the year ended December 31, 2017, which is not included
within  our  consolidated  financial  statements,  was  a  decrease  to  current  assets  of  $83,000,  a  decrease  to  total  assets  of  $50,000,  and  a  decrease  to
stockholders' equity of $57,000.

Non-GAAP Financial Measures

Our definition and use of Adjusted EBITDA

“Adjusted  EBITDA”  is  a  non-GAAP  financial  measure  that  we  define  as  earnings  (net  (loss)  income)  before  interest,  taxes,  depreciation  and
amortization, as well as impairment of goodwill, an increase in inventory allowance and inventory write-offs, and retirement of rental equipment.  This
term, as used and defined by us, may not be comparable to similarly titled measures employed by other companies and is not a measure of performance
calculated in accordance with GAAP. Adjusted EBITDA should not be considered in isolation or as a substitute for operating income, net income or loss,
cash  flows  provided  by  operating,  investing  and  financing  activities,  or  other  income  or  cash  flow  statement  data  prepared  in  accordance  with
GAAP.  However, management believes Adjusted EBITDA is useful to an investor in evaluating our operating performance because:

•

•

•

it is widely used by investors in the energy industry to measure a company’s operating performance without regard to items excluded from the
calculation of Adjusted EBITDA, which can vary substantially from company to company depending upon accounting methods and book value of
assets, capital structure and the method by which assets were acquired, among other factors;

it helps investors to more meaningfully evaluate and compare the results of our operations from period to period by removing the impact of our
capital structure and asset base from our operating structure; and

it is used by our management for various purposes, including as a measure of operating performance, in presentations to our Board of Directors, as
a basis for strategic planning and forecasting, and as a component for setting incentive compensation.

Adjusted EBITDA has limitations as an analytical tool, and you should not consider it in isolation, or as a substitute for analysis of our results as

reported under generally accepted accounting principles.  Some of these limitations are:

• Adjusted EBITDA does not reflect our cash expenditures, future requirements for capital expenditures, or contractual commitments;

• Adjusted EBITDA does not reflect changes in, or cash requirements for, our working capital needs;

• Adjusted EBITDA does not reflect the cash requirements necessary to service interest or principal payments on our debts; and

•

although depreciation and amortization are non-cash charges, the assets being depreciated and amortized will often have to be replaced in the
future, and Adjusted EBITDA does not reflect any capital expenditures for such replacements.

There  are  other  material  limitations  to  using  Adjusted  EBITDA  as  a  measure  of  performance,  including  the  inability  to  analyze  the  impact  of

certain recurring items that materially affect our net income or loss, and the lack of comparability of

22

 
 
 
 
results  of  operations  of  different  companies.    Please  read  the  table  below  under  “Reconciliation”  to  see  how Adjusted  EBITDA  reconciles  to  our  net
income, the most directly comparable GAAP financial measure.

Reconciliation

The following table reconciles our net (loss) income, the most directly comparable GAAP financial measure, to Adjusted EBITDA:

Net (loss) income

Interest expense

Income tax (benefit) expense

Depreciation and amortization

Impairment of goodwill

Inventory allowance

Retirement of rental equipment

Adjusted EBITDA

Our definition and use of Adjusted Gross Margin

Year Ended December 31,

2019

2018

2017

2016

2015

(in thousands)

$ (13,864)   $

(466)   $

19,794    $

6,469    $

10,147   

15   

(693)  

23,268   

10,039   

3,758   

1,512   

69   

72   

22,080   

—   

—   

—   

14   

(18,287)  

21,316   

—   

273   

—   

8   

1,996   

21,796   

—   

566   

545   

15   

5,117   

22,758   

—   

205   

4,370   

$

24,035    $

21,755    $

23,110    $

31,380    $

42,612   

We define “Adjusted Gross Margin” as total revenue less costs of revenues (excluding depreciation and amortization expense). Adjusted gross
margin is included as a supplemental disclosure because it is a primary measure used by our management as it represents the results of revenue and costs
(excluding depreciation and amortization expense), which are key components of our operations. Adjusted gross margin differs from gross margin, in that
gross margin includes depreciation expense. We believe adjusted gross margin is important because it focuses on the current operating performance of our
operations  and  excludes  the  impact  of  the  prior  historical  costs  of  the  assets  acquired  or  constructed  that  are  utilized  in  those  operations.  Depreciation
expense does not accurately reflect the costs required to maintain and replenish the operational usage of our assets and therefore may not portray the costs
from  current  operating  activity.  Rather,  depreciation  expense  reflects  the  systematic  allocation  of  historical  property  and  equipment  values  over  the
estimated useful lives.

Adjusted gross margin has certain material limitations associated with its use as compared to gross margin. These limitations are primarily due to
the exclusion of depreciation expense, which is material to our results of operations. Because we use capital assets, depreciation expense is a necessary
element  of  our  costs  and  our  ability  to  generate  revenue.  In  order  to  compensate  for  these  limitations,  management  uses  this  non-GAAP  measure  as  a
supplemental measure to other GAAP results to provide a more complete understanding of our performance.

As an indicator of our operating performance, adjusted gross margin should not be considered an alternative to, or more meaningful than, gross
margin  as  determined  in  accordance  with  GAAP.  Our  adjusted  gross  margin  may  not  be  comparable  to  a  similarly  titled  measure  of  another  company
because other entities may not calculate adjusted gross margin in the same manner.

23

 
 
 
Reconciliation

The following table calculates gross margin, the most directly comparable GAAP financial measure, and reconciles it to adjusted gross margin:

Year Ended December 31,

2019

2018

2017

2016

2015

(in thousands)

Total revenue

$ 78,444    $ 65,478    $ 67,693    $ 71,654    $ 95,919   

Costs of revenue, exclusive of depreciation and amortization

(44,310)  

(34,809)  

(34,552)  

(31,306)  

(42,450)  

Depreciation allocable to costs of revenue

Gross margin

Depreciation allocable to costs of revenue

Adjusted gross margin

(22,908)  

(21,904)  

(21,162)  

(21,641)  

(22,605)  

11,226   

22,908   

8,765   

21,904   

11,979   

21,162   

18,707   

21,641   

30,864   

22,605   

$ 34,134    $ 30,669    $ 33,141    $ 40,348    $ 53,469   

ITEM 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion is intended to assist you in understanding our financial position and results of operations for each of the years ended
December 31, 2019, 2018 and 2017.  You should read the following discussion and analysis in conjunction with our audited financial statements and the
related notes.

The  following  discussion  contains  forward-looking  statements.    For  a  description  of  limitations  inherent  in  forward-looking  statements,  see

“Special Note Regarding Forward-Looking Statements” on page ii.

Overview

We  fabricate,  manufacture,  rent  and  sell  natural  gas  compressors  and  related  equipment.    Our  primary  focus  is  on  the  rental  of  natural  gas
compressors.    Our  rental  contracts  generally  provide  for  initial  terms  of  six  to  60  months,  with  our  larger  horsepower  units  having  longer  initial
terms.  After the initial term of our rental contracts, most of our customers have continued to rent our compressors on a month-to-month basis.  Rental
amounts  are  billed  monthly  in  advance  and  include  maintenance  of  the  rented  compressors.    As  of  December  31,  2019,  we  had  1,419  natural  gas
compressors totaling 299,836 horsepower rented to 95 customers, compared to 1,361 natural gas compressors totaling 230,089 horsepower rented to 94
customers at December 31, 2018.  Of the 1,419 compressors rented at December 31, 2019, 953 were rented on a month-to-month basis.

We  also  fabricate  natural  gas  compressors  for  sale  to  our  customers,  designing  compressors  to  meet  unique  specifications  dictated  by  well
pressures,  production  characteristics  and  particular  applications  for  which  compression  is  sought.    Fabrication  of  compressors  involves  our  purchase  of
engines, compressors, coolers and other components, and our assembling of these components on skids for delivery to customer locations.  These major
components of our compressors are acquired through periodic purchase orders placed with third-party suppliers on an “as needed” basis, which presently
requires  a  two  to  three  month  lead  time  with  delivery  dates  scheduled  to  coincide  with  our  estimated  production  schedules.   Although  we  do  not  have
formal  continuing  supply  contracts  with  any  major  supplier,  we  believe  we  have  adequate  alternative  sources  available.    In  the  past,  we  have  not
experienced any sudden and dramatic increases in the prices of the major components for our compressors; however, the occurrence of such an event could
have a material adverse effect on the results of our operations and financial condition, particularly if we were unable to increase our rental rates and sales
prices proportionate to any such component price increases.

We also manufacture a line of compressor frames, cylinders and parts, known as our CiP (Cylinder-in-Plane) product line.  We use finished CiP
component  products  in  the  fabrication  of  compressor  units  for  sale  or  rental  by  us  or  sell  the  finished  component  products  to  other  compressor
fabricators.  We also design, fabricate, sell, install and service flare stacks and related ignition and control devices for onshore and offshore incineration of
gas compounds such as hydrogen sulfide, carbon dioxide, natural gas and liquefied petroleum gases.  To provide customer support for our compressor and
flare sales businesses, we stock

24

 
 
 
varying levels of replacement parts at our Midland, Texas facility and at field service locations.  We also provide an exchange and rebuild program for
screw compressors and maintain an inventory of new and used compressors to facilitate this business.

We provide service and maintenance to our non-rental customers under written maintenance contracts or on an as-required basis in the absence of

a service contract.  Maintenance agreements typically have terms of six months to one year and require payment of a monthly fee.

The following table sets forth our revenues from each of our three operating categories for the periods presented:

Rental

Sales

Service and maintenance

Total

Year Ended December 31,

2019

2018

2017

(in thousands)

56,701    $

47,766    $

19,763   

1,980   

16,269   

1,443   

78,444    $

65,478    $

$

$

46,046   

20,208   

1,439   

67,693   

Our strategy for growth is focused on our compressor rental business.  Margins, exclusive of depreciation and amortization, for our rental business
historically run in the mid-50% to low-60% range, while margins for the compressor sales business tend to be in the mid-20% range.  If our rental business
grows and contributes a larger percentage of our total revenues, we expect our overall company-wide margins, exclusive of depreciation and amortization,
to improve over time.

The  oil  and  natural  gas  equipment  rental  and  services  industry  is  cyclical  in  nature.    The  most  critical  factor  in  assessing  the  outlook  for  the
industry is the worldwide supply and demand for oil and natural gas and the corresponding changes in commodity prices.  As demand and prices increase,
oil and natural gas producers typically increase their capital expenditures for drilling, development and production activities, although recent equity capital
constraints and demands from institutional investors to keep spending within operating cash flow have meaningfully restrained capital expenditure budgets
of domestic exploration and production companies.  Generally, increased capital expenditures ultimately result in greater revenues and profits for service
and equipment companies.

In general, we expect our overall business activity and revenues to track the level of activity in the oil and natural gas industry, with changes in
crude oil and condensate production and consumption levels and prices affecting our business more than changes in domestic natural gas production and
consumption levels and prices. In recent years we have increased our rental and sales in unconventional oil shale plays, which are more dependent on crude
oil prices. With this shift towards oil production the demand for overall compression services and products is driven by two general factors; an increased
focus  by  producers  on  artificial  lift  applications,  e.g.,  production  enhancement  with  compression  assisted  gas  lift;  and  declining  reservoir  pressure  in
maturing natural gas producing fields, especially non-conventional production. These types of applications have historically been serviced by wellhead size
compressors, and continue to be, but there has also been an economic move by our customers towards centralized drilling and production facilities, which
have increased the market need for larger horsepower compressor packages. We recognized this need over the past two to three years and have shifted our
cash  and  fabrication  resources  towards  designing,  fabricating  and  renting  gas  compressor  packages  that  range  from  400  horsepower  up  to  1,380
horsepower.  While  this  is  a  response  to  market  conditions  and  trends,  it  also  provides  us  with  the  opportunity  to  compete  as  a  full-line  compression
provider.

We  typically  experience  a  decline  in  demand  during  periods  of  low  crude  oil  and  natural  gas  prices.  Low  crude  oil  and  natural  gas  prices
experienced throughout 2016 continued into mid-2017. In the latter half of 2017, we saw an increase in oil prices and activity that continued during most of
2018. During 2019, we witnessed a moderation of crude oil prices as well as drilling and completion activity levels. During the first quarter of 2020, we
saw a substantial decline in the prices for oil and natural gas. Activity levels of exploration and production companies have been and will be dependent not
only  on  commodity  prices,  but  also  on  their  ability  to  generate  sufficient  operational  cash  flow  to  fund  their  activities.  Generally,  though,  we  feel  that
production activities (in which we are involved) will fare better than drilling activity. .

For fiscal year 2020, our forecasted capital expenditures will be directly dependent upon our customers’ compression requirements and are not
anticipated  to  exceed  our  internally  generated  cash  flows.   Any  required  capital  will  be  for  additions  to  our  compressor  rental  fleet  and/or  addition  or
replacement  of  service  vehicles.    We  believe  that  cash  on  hand  and  cash  flows  from  operations  will  be  sufficient  to  satisfy  our  capital  and  liquidity
requirements through 2020.  If we require additional capital to fund any significant unanticipated expenditures, including any material acquisitions of other
businesses, joint ventures or

25

 
 
 
 
other opportunities, this additional capital could exceed our current resources, might not be available to us when we need it, or might not be on acceptable
terms.

Critical Accounting Policies and Practices

We have identified the policies below as critical to our business operations and the understanding of our results of operations.  In the ordinary
course of business, we have made a number of estimates and assumptions relating to the reporting of results of operations and financial condition in the
preparation  of  our  financial  statements  in  conformity  with  accounting  principles  generally  accepted  in  the  United  States.    Actual  results  could  differ
significantly  from  those  estimates  under  different  assumptions  and  conditions.    We  believe  that  the  following  discussion  addresses  our  most  critical
accounting  policies,  which  are  those  that  are  most  important  to  the  portrayal  of  our  financial  condition  and  results  of  operations  and  require  our  most
difficult, subjective, and complex judgments, often as a result of the need to make estimates about the effect of matters that are inherently uncertain. We
describe our significant accounting policies more fully in Note 2 ("Summary of Significant Accounting Policies") to our consolidated financial statements.

Our critical accounting policies are as follows:

•

•

•

•

•

•

revenue recognition;

estimating the allowance for doubtful accounts receivable;

accounting for operating leases;

accounting for income taxes;

accounting for long-lived assets, intangible assets and goodwill; and

accounting for inventory.

Revenue Recognition Policy

The  Company  adopted  ASC  606,  Revenue  from  Contracts  with  Customers  ("ASC  606")  on  January,  1,  2018.  As  a  result,  the  Company  has

changed its accounting policy for revenue recognition as detailed below.

Revenue is measured based on a consideration specified in a customer’s contract, excluding any sale incentives and taxes collected on behalf of
third parties (i.e. sales and property taxes). We recognize revenue once a performance obligation has been satisfied and control over a product or service has
transferred  to  the  customer.  Shipping  and  handling  costs  incurred  are  accounted  for  as  fulfillment  costs  and  are  included  in  cost  of  revenues  in  our
Consolidated Statements of Operations.

Nature of Goods and Services

Rental Revenue. The Company generates revenue from renting compressors and flare systems to our customers. These contracts may also include
a fee for servicing the compressor or flare during the rental contract. Our rental contracts typically range from six to 60 months, with our larger horsepower
compressors  having  longer  minimum  contract  terms.  Our  rental  revenue  is  recognized  over  time,  with  equal  monthly  payments  over  the  term  of  the
contract. After the terms of the contract have expired, a customer may renew their contract or continue renting on a monthly basis thereafter.

Sales  Revenue.  The  Company  generates  revenue  by  the  sale  of  custom/fabricated  compressors,  flare  systems  and  parts,  as  well  as,
exchange/rebuilding customer owned compressors and sale of used rental equipment. The Company designs and fabricates compressors and flares based on
the customer’s specifications outlined in their contract. Though the equipment being built is customized by the customer, control under these contracts does
not pass to the customer until the compressor or flare package is completed and shipped, or, in accordance with a bill and hold arrangements, the customer
accepts title and assumes the risk and rewards of ownership. We request some of our customers to make progressive payments as the product is being built;
these payments are recorded as a contract liability on the Deferred Income line on the consolidated balance sheet until control has been transferred. These
contracts also may include an assurance warranty clause to guarantee the product is free from defects in material and workmanship for a set duration of
time; this is a standard industry practice and is not considered a performance obligation.

Allowance for Doubtful Accounts Receivable

26

We perform ongoing credit evaluations of our customers and adjust credit limits based on management's assessment of the customer's financial
condition and payment history, as well as industry conditions and general economic conditions. We continuously monitor collections and payments from
our customers and maintain a provision for estimated credit losses based upon our historical experience and any specific customer collection issues that we
have identified.  While such credit losses have historically been within our expectations and the provisions established, we cannot guarantee that we will
continue  to  experience  the  same  credit  loss  rates  that  we  have  in  the  past.    Management  believes  that  its  allowance  for  doubtful  accounts  is  adequate;
however, actual write-offs may exceed the recorded allowance.

Accounting for Income Taxes

As part of the process of preparing our financial statements, we are required to estimate our federal income taxes as well as income taxes in each
of  the  states  in  which  we  operate.    This  process  involves  us  estimating  our  actual  current  tax  exposure  together  with  assessing  temporary  differences
resulting  from  differing  treatment  of  items  for  tax  and  accounting  purposes.    These  differences  result  in  deferred  tax  assets  and  liabilities,  which  are
included in our consolidated balance sheet.  We must then assess the likelihood that our deferred tax assets will be recovered from future taxable income
and, to the extent we believe that recovery is not probable, we must establish a valuation allowance.  To the extent we establish a valuation allowance or
increase this allowance in a period, we must include an expense in the tax provision in the statement of income.

Significant  management  judgment  is  required  in  determining  our  provision  for  income  taxes,  our  deferred  tax  assets  and  liabilities  and  any
valuation allowance recorded against our net deferred tax assets. We currently have no valuation allowance and fully expect to utilize all of our deferred tax
assets.

ASC  740  also  prescribes  a  recognition  threshold  and  measurement  attribute  for  the  financial  statement  recognition  and  measurement  of  a  tax
position taken or expected to be taken in a tax return. In order to record any financial statement benefit, we are required to determine, based on technical
merits of the position, whether it is more likely than not (a likelihood of more than 50 percent) that a tax position will be sustained upon examination,
including resolution of any related appeals or litigation processes. If that step is satisfied, then we must measure the tax position to determine the amount of
benefit to recognize in the financial statements. The tax position is measured at the largest amount of the benefit that is greater than 50 percent likely of
being realized upon ultimate settlement. Our policy regarding income tax interest and penalties is to expense those items as other expense.
Long-Lived Assets, Intangible Assets and Goodwill

Rental Equipment, Property and Equipment (Including Retirement of Rental Equipment)

Rental  equipment  and  property  and  equipment  are  recorded  at  cost  less  accumulated  depreciation,  except  for  work-in-progress  on  new  rental
equipment which is recorded at cost until it’s complete and added to the fleet. Depreciation is computed using the straight-line method over the estimated
useful lives of the assets. Our rental equipment has an estimated useful life between 15 and 25 years, while our property and equipment has an estimate
useful lives which range from 3 to 39 years.  The majority of our property and equipment, including rental equipment, is a direct cost to generating revenue.

In January 2019, the Company reviewed the estimated useful lives of its rental equipment. This review indicated that the actual lives of its larger
horsepower rental equipment were longer than the estimated useful lives used for depreciation purposes in the Company’s financial statements. These units
incorporate newer technology and heavier, more robust castings and forging, which allows for complete overhauls at longer cycles when compared to its
older, lower horsepower units.

We  assess  the  impairment  of  rental  equipment  and  property  and  equipment  whenever  events  or  changes  in  circumstances  indicate  that  the  net
recorded amount may not be recoverable.  The following factors could trigger an impairment review: significant underperformance relative to historical or
projected future cash flows; significant adverse changes in the extent or manner in which asset (or asset group) is being used or its condition, including a
meaningful drop in fleet utilization over the prior four quarters; significant negative industry or company-specific trends or actions, including meaningful
capital expenditure budget reductions by our major customers or other sizable exploration and production or midstream companies, as well as significant
declines  in  oil  and  natural  gas  prices;  legislative  changes  prohibiting  us  from  leasing  our  units  or  flares;  or  poor  general  economic  conditions.  An
impairment loss is recognized if the future undiscounted cash flows associated with the asset (or asset group) and the estimated fair value of the asset are
less than the asset's carrying value.

The COVID-19 pandemic has caused a significant economic decline during the first quarter of 2020. In addition, the pandemic and recent actions
by Saudi Arabia and Russia have resulted in a significant decline in oil prices during the same time period. If economic and industry conditions do not
improve, an impairment review during 2020 could be triggered.

27

Goodwill (Including Impairment During 2019)

Goodwill represents the cost in excess of fair value of the identifiable net assets acquired. Goodwill is tested annually for impairment or as needed
upon  the  occurrence  of  certain  events  or  substantive  changes  in  circumstances  that  indicate  goodwill  is  more  likely  than  not  impaired.  During the third
quarter of 2019, the Company examined various qualitative factors to determine if a quantitative goodwill impairment test was needed. As a result of our
qualitative assessment, we proceeded to perform our quantitative goodwill impairment analysis, where we used an independent valuation specialist to assist
us in determining the fair value of our net assets. In this impairment analysis, the estimated fair value of our net assets was determined utilizing market and
income-based  approaches.  Determining  fair  value  in  this  analysis  required  significant  judgment,  including  judgments  about  appropriate  comparable
companies,  appropriate  discount  rates  and  our  estimated  future  cash  flows,  which  are  subject  to  change.  As  a  result  of  our  quantitative  evaluation,  we
recorded a goodwill impairment charge of $10.0 million in 2019.

Intangibles

At December 31, 2019 and 2018, NGS had intangible assets, which relate to developed technology and a trade name which was acquired in our

acquisition of Screw Compression Systems in January 2005.  This asset is not being amortized as it has been deemed to have an indefinite life.

Our policy is to review intangibles that are being amortized for impairment when indicators of impairment are present. In addition, it is our policy
to  review  indefinite-lived  intangible  assets  for  impairment  annually  or  when  indicators  of  impairment  are  present.  We  review  intangibles  through  an
assessment  of  the  estimated  future  cash  flows  related  to  such  assets.    In  the  event  that  assets  are  found  to  be  carried  at  amounts  in  excess  of  estimated
undiscounted  future  cash  flows,  then  the  assets  will  be  adjusted  for  impairment  to  a  level  commensurate  with  a  discounted  cash  flow  analysis  of  the
underlying assets.  Based upon our analysis, we experienced no impairment of intangible assets (excluding goodwill) during the years ended December 31,
2019 or 2018.

In addition, in conjunction with our quantitative assessment of goodwill, we used the services of an independent valuation specialist to assist us in
determining the fair value of our trade name during the third quarter of 2019. In this impairment analysis, the estimated fair value of our trade name was
determined utilizing an income-based approach that required significant judgment, including those about an appropriate royalty rate and discount rate. This
analysis indicated no impairment of our trade name.

Inventories

We value our total inventory (current and long-term) at the lower of the actual cost and net realizable value of the inventory.  We regularly review
inventory quantities on hand and record a provision for excess and obsolete inventory based primarily on current and anticipated customer demand and
production  requirements.  The  Company  accesses  anticipated  customer  demand  based  on  current  and  upcoming  capital  expenditure  budgets  of  its  major
customers  as  well  as  other  significant  companies  in  the  industry,  along  with  oil  and  natural  gas  price  forecasts  and  other  factors  affecting  the  industry.
Given its concerns about the industry backdrop, Company management determined during 2019 that an increase of its inventory allowance was necessary.
Due  to  the  slow  moving  nature  or  obsolescence  of  a  portion  of  the  Company's  long-term  inventory  and  inventory  related  to  the  retirement  of  rental
equipment,  management  recorded  an  increase  of  $3.4  million  in  the  inventory  allowance  reserve  for  costs  that  may  not  be  recoverable  in  the  future.
Management  later  identified  another  $408,000  of  slow  moving  or  obsolete  inventory,  which  was  written  off.  For  the  year  ended  December  31,  2019,
inventory allowance and write-off totaled $3.8 million. We ended 2019 with an inventory allowance balance of $24,000.

The COVID-19 pandemic has caused a significant economic decline during the first quarter of 2020. In addition, the pandemic and recent actions
by Saudi Arabia and Russia have resulted in a significant decline in oil prices during the same time period. If economic and industry conditions do not
improve, an additional review of our inventory for excess and obsolete items during 2020 could be necessary.

Our Performance Trends and Outlook

On  January  30,  2020,  the  World  Health  Organization  (“WHO”)  announced  a  global  health  emergency  because  of  a  new  strain  of  coronavirus
known  as  COVID-19  due  to  the  risks  it  imposes  on  the  international  community  as  the  virus  spreads  globally.  In  March  2020,  the  WHO  classified  the
COVID-19 outbreak as a pandemic, based on the rapid increase in exposure globally. During this time, the market began to experience a decline in oil
prices in response to oil demand concerns due to the

28

 
global economic impacts of COVID-19. In addition, recent events concerning OPEC and Russia resulted in Saudi Arabia significantly discounting the price
of its crude oil, as well as Saudi Arabia and Russia significantly increasing their oil supply. These actions have led to significant weakness in oil prices and
ensuing reductions of exploration and production company capital and operating budgets.

As of March 31, 2020, the full impact of the COVID-19 outbreak continues to evolve daily. With the significant decline in oil prices as well as the
general economic decline caused by the impacts of COVID-19, we expect utilization to decline among our smaller horsepower and medium horsepower
units during the remainder of 2020 after a minimal decline during the first quarter of 2020. In terms of sales, we expect minimal compressor sales for the
year due to much lower capital expenditure budgets throughout the industry, including those of our major customers. Finally, we have recently experienced
and  expect  to  continue  to  experience  pricing  pressure  from  our  customers  and  competitors  until  industry  and  economic  conditions  improve.  We  are
currently experiencing no issues with potential workforce and supply chain disruptions. In addition, our relationship with our major customer continues to
be strong, and they have continued to pay our invoices in a timely, consistent manner. Nevertheless, if any of these circumstances change, our business
could be adversely affected.

While  management  anticipates  that  the  industry  and  economic  impact  of  the  pandemic  and  OPEC’s  actions  will  have  a  negative  effect  on  its
results of operations in 2020 and perhaps beyond, the degree to which these factors will impact our business remains uncertain. Please read Item 1A, Risk
Factors, in this report.

Results of Operations

Year Ended December 31, 2019 Compared to the Year Ended December 31, 2018

The table below shows our revenues and percentage of total revenues for each of our product lines for the years ended December 31, 2019 and

2018.  

Rental

Sales

Service & Maintenance

Total

Revenue

Year Ended December 31,

2019

2018

$

$

56,701   

19,763   

1,980   

78,444   

(dollars in thousands)

72.3  % $

25.2  %

2.5  %

47,766   

16,269   

1,443   

$

65,478   

73.0  %

24.8  %

2.2  %

Total revenue increased to $78.4 million from $65.5 million, or 19.8%, for the year ended December 31, 2019 compared to 2018. This increase
was mainly a result of higher rental revenue (18.7% increase) primarily due to a greater number of large horsepower units being rented as well as higher
sales revenue (21.5% increase) primarily due to increased compressor sales.

Rental revenue increased to $56.7 million from $47.8 million for the year ended December 31, 2019 compared to 2018. As of December 31, 2019,
we had 2,304 natural gas compressors in our rental fleet, down from 2,567 units at year end 2018 due the retirement of 327 units (with 39,758 horsepower)
during  the  third  quarter  of  2019.  Despite  this  decrease  due  to  unit  retirement,  the  Company's  total  unit  horsepower  increased  by  7.7%  to  429,650  at
December  31,  2019  compared  to  398,765  horsepower  year  end  2018,  which  reflects  the  addition  of  54  high  horsepower  compressors  with  70,020
horsepower to the Company's fleet during 2019.  As of December 31, 2019, we had 1,419 natural gas compressors totaling 299,836 horsepower rented to
95 customers, compared to 1,361 natural gas compressors totaling 230,089 horsepower rented to 94 customers as of December 31, 2018. The rental fleet
had  a  unit  utilization  as  of  December  31,  2019  and  2018,  respectively,  of  61.6%  and  53.0%  while  our  horsepower  utilization  for  the  same  periods,
respectively, was 69.8% and 57.7%. The rise in both utilizations was mainly the result of the rise in demand for our higher horsepower units as well as unit
retirements during the third quarter of 2019.

Sales revenue increased to $19.8 million from $16.3 million for the year ended December 31, 2019, compared to 2018. This increase in largely
attributable to an increase in compressor sales partially offset by a decrease in flare sales. Sales are subject to fluctuations in timing of industry activity
related to capital projects and, as such, can vary substantially between periods.

29

 
 
 
 
During the third quarter of 2019, the Company examined various qualitative factors to determine if a quantitative goodwill impairment test was
needed.  After  examining  various  qualitative  factors,  the  Company  performed  a  goodwill  impairment  analysis  as  of  September  30,  2019.  The  analysis
showed our carrying value of net assets exceeded its fair value, indicating that goodwill was fully impaired. Accordingly, the Company recorded a goodwill
impairment charge of $10.0 million during the third quarter of 2019.

Given its concerns about the industry backdrop, Company management determined during 2019 that an increase of its inventory allowance was
necessary. Due to the slow moving nature or obsolescence of a portion of the Company's long-term inventory and inventory related to the retirement of
rental equipment, management recorded an increase of $3.4 million in the inventory allowance reserve for costs that may not be recoverable in the future.
Management  later  identified  another  $408,000  of  slow  moving  or  obsolete  inventory,  which  was  written  off.  For  the  year  ended  December  31,  2019,
inventory allowance and write-off totaled $3.8 million. We ended 2019 with an inventory allowance balance of $24,000.

Given its concerns about the current industry backdrop, Company management determined during the third quarter of 2019 which units were not
of the type, configuration, make or model that our customers are demanding or that were not cost efficient to refurbish, maintain and/or operate. As a result
of  this  review,  we  determined  327  units  should  be  retired  from  our  rental  fleet.  Accordingly,  we  recorded  a  $1.5  million  loss  on  retirement  of  rental
equipment during the year ended December 31, 2019.

Operating loss increased to $15.2 million for the year ended December 31, 2019 compared to an operating loss of $0.5 million for the year ended
December 31, 2018. The increase in operating loss was mainly due to the inventory allowance and write-off, loss on the retirement of rental units, and a
goodwill impairment charge that totaled $15.3 million, partially offset by higher rental revenues and compressor sales.

Selling, general, and administrative expenses increased to $10.7 million for the year ended December 31, 2019, as compared to $9.1 million for
2018. This 17.7% increase was primarily the result of increases in officer bonuses ($0.5 million), deferred compensation ($0.4 million, most of which was
non-cash), professional services ($0.3 million), and stock compensation ($0.2 million).

Depreciation and amortization expense increased to $23.3 million from $22.1 million, or 5.4%, for the year ended December 31, 2019, compared
to 2018.  The increase is the result of larger horsepower units being added to the fleet. We added 82 units (approximately 74,000 horsepower) to our fleet
over the past twelve months. Fifty-four of those units were 400 horsepower or larger (including 49 at 1,380 horsepower), representing approximately 95%
of the horsepower added.

Income tax benefit increased to $0.7 million from a $72,000 expense for the year ended December 31, 2019 compared to 2018. As shown in Note
9 to these financial statements, our effective tax rate for both years differs from the U.S. federal statutory rate of 21%. Our income tax benefit in 2019 was
largely due to our net loss of $13.7 million but was largely offset by a difference in goodwill impairment for tax purposes as well as an adjustment to our
state tax rates that increased our deferred income tax expense by approximately $0.8 million. The Company's 2018 income tax expense was impacted by
the Company discovering a potentially uncertain tax position attributable deductibility of certain executive compensation expense for federal income tax
purposes totaling approximately $168,000, $149,000 and $230,000 for the years ended December 31, 2017, 2016 and 2015, respectively. As a result, in
accordance with ASC Topic 740, during the fourth quarter of 2018, the Company recorded a tax adjustment of $547,000 and accrued penalty and interest
expense of $55,000 attributable to the uncertain tax position. The Company filed amended tax returns during 2019 for the years ended 2015, 2016 and 2017
and has recognized certain offsetting deductions, thus removing the large majority of its uncertain tax position reserve as of December 31, 2019.

Year Ended December 31, 2018 Compared to the Year Ended December 31, 2017

The table below shows our revenue and percentage of total revenues for each of our product lines for the years ended December 31, 2018 and

December 31, 2017.  

Rental

Sales

Service & Maintenance

Total

Revenue

Year Ended December 31,

2018

2017

$

$

47,766   

16,269   

1,443   

65,478   

.

(dollars in thousands)

73.0 % $

24.8 %

2.2 %

46,046   

20,208   

1,439   

$

67,693   

68.0 %

29.9 %

2.1 %

30

 
 
 
 
Total revenue decreased to $65.5 million from $67.7 million, or 3.3%, for the year ended December 31, 2018, compared to 2017. This was the
result of a 19.5% decrease in sales revenue, which was offset by a 3.7% increase in rental revenue and a 0.3% increase in service and maintenance revenue.

Rental revenue increased to $47.8 million from $46.0 million, or 3.7%, for the year ended December 31, 2018, compared to 2017.  This increase is
due to an increase in the average oil and natural prices for the year ended December 31, 2018, resulting in units being deployed, as well as a rise in the
demand for our higher horsepower units. As of December 31, 2018, we had 2,572 natural gas compressors in our rental fleet totaling 398,765 horsepower,
as compared to 2,546 natural gas compressors totaling 369,961 horsepower as of December 31, 2017.  As of December 31, 2018, we had 1,361 natural gas
compressors totaling 230,089 horsepower rented to 94 customers, compared to 1,259 natural gas compressors totaling 184,382 horsepower rented to 87
customers as of December 31, 2017. The rental fleet had a utilization of 53.0% as of December 31, 2018 as compared to 49.5% at December 31, 2017.

Sales  revenue  decreased  to  $16.3  million  from  $20.2  million,  or  19.5%,  for  the  year  ended  December  31,  2018,  compared  to  2017.  Our  sales
activity can fluctuate depending on the demand from our customers' investments in non-conventional shale plays which require compression for producing
natural  gas  and  scheduling  of  projects  in  our  fabrication  facility.  Due  to  economic  uncertainty  and  continued  tight  credit  markets,  the  energy  industry
continued to encounter reduced capital spending. While our strategy is to maintain our rental revenues so that they are a larger component of total revenue,
we will continue to build and sell custom fabricated equipment. In support of this, we intend to cultivate new sales oriented customers and are actively
pursuing  small,  medium  and  large  reciprocating  compressor  fabrication  projects,  as  well  as,  building  rotary  screw-type  equipment  of  any  size.  Sales
include: (1) compressor unit sales, (2) flare sales, (3) parts sales and (4) compressor rebuilds.

Operating income of $1.5 million for the year ended December 31, 2017 decreased to a $0.5 million loss for the year ended December 31, 2018.

This decrease is attributed to a 6.4% drop in our rental margins, due to costs incurred in deploying units.

During  the  fourth  quarter  of  2018,  management  performed  a  review  of  our  rental  compressor  units  and  determined  there  were  13  units  fully

depreciated in our rental fleet which needed to be retired, representing total horsepower of 1,360. 

Selling, general, and administrative expenses decreased to $9.1 million for the year ended December 31, 2018, as compared to $10.1 million for

2017. This 9.8% decrease is primarily a result in a decrease in stock compensation of $1.7 million.

Depreciation and amortization expense increased to $22.1 million from $21.3 million, or 3.6%, for the year ended December 31, 2018, compared
to 2017.  The increase is the result of larger horsepower units being added to the fleet. We added 31 units (approximately 29,508 horsepower) to our fleet
over the past twelve months. Twenty-seven of these were 400 horsepower or larger, representing 99% of the horsepower added.

Income tax expense decreased to $72,000 from a $18.3 million benefit for the year ended December 31, 2018 compared to 2017. As discussed in
Note  9  to  these  financial  statements,  during  the  fourth  quarter  of  2018,  the  Company  discovered  a  potentially  uncertain  tax  position  attributable
deductibility of certain executive compensation expense for federal income tax purposes aggregating approximately $168,000, $149,000, $230,000 for the
years  ended  December  31,  2017,  2016  and  2015,  respectively.  As  a  result,  in  accordance  with  ASC  Topic  740,  during  the  fourth  quarter  of  2018,  the
Company recorded a tax adjustment of $547,000 and accrued penalty and interest expense of $55,000 attributable to the uncertain tax position. In 2017, the
$18.3 million tax benefit was the result of the $18.4 million income tax benefit recorded in connection with the 2017 Tax Act, due to the remeasurement of
our deferred tax assets and liabilities at the new federal statutory rate.

Adjusted Gross Margin Year Ended December 31, 2019 Compared to the Year Ended December 31, 2018

The table below shows our adjusted gross margin and related percentages for each of our product lines for the years ended December 31, 2019 and

December 31, 2018.  Adjusted gross margin is the difference between revenue and cost of revenues, exclusive of depreciation and amortization expense.

31

 
Rental 

Sales 

Service & Maintenance 

Total 

Adjusted Gross Margin (1)
Year Ended December 31,

2019

2018

(dollars in thousands)

  $

29,118   

51.4  % $

25,906   

3,666   

1,350   

  $

34,134   

18.5  %

68.2  %
43.5  % $

3,705   

1,058   

30,669   

54.2  %

22.8  %

73.3  %

46.8  %

(1) For a reconciliation of adjusted gross margin to its most directly comparable financial measure calculated and presented in accordance with GAAP,
please read "Item 6. Selected Financial Data - Non-GAAP Financial Measures" in this Report.

Our overall adjusted gross margin percentage dropped to 43.5% for the year ended December 31, 2019 compared to 46.8% for the year ended
December 31, 2018, exclusive of depreciation and amortization. Our drop in gross margins is mainly due to a 2.8% drop in rental revenue margins, which
decreased to 51.4% for the year ended December 31, 2019 compared to 54.2% during 2018. This decrease was due to an increased bad debt allowance as
well as increased maintenance and repair costs, particularly "make-ready" jobs on units being placed back into service. Sales margin decreased to 18.5% in
2019 from 22.8% in 2018 due to higher payroll and lower labor and overhead efficiency in our fabrication facilities. Third party service and maintenance
margins decreased to 68.2% from 73.3% for the year ended December 31, 2019 compared to 2018. Service and maintenance only represents 2.5% of our
revenue in 2019, providing minimal impact on our overall adjusted gross margin.

Adjusted Gross Margin Year Ended December 31, 2018 Compared to the Year Ended December 31, 2017

The table below shows our adjusted gross margin and related percentages for each of our product lines for the years ended December 31, 2018
and  December  31,  2017.    Adjusted  gross  margin  is  the  difference  between  revenue  and  cost  of  revenues,  exclusive  of  depreciation  and  amortization
expense.

Rental 

Sales 

Service & Maintenance 

Total 

Adjusted Gross Margin (1)
Year Ended December 31,

2018

2017

(dollars in thousands)

  $

25,906   

54.2  % $

27,886   

3,705   

1,058   

22.8  %

73.3  %

4,186   

1,069   

  $

30,669   

46.8  % $

33,141   

60.6  %

20.7  %

74.3  %

49.0  %

(1) For a reconciliation of adjusted gross margin to its most directly comparable financial measure calculated and presented in accordance with GAAP,
please read "Item 6. Selected Financial Data - Non-GAAP Financial Measures" in this Report.

The overall adjusted gross margin percentage dropped to 46.8% for the year ended December 31, 2018 compared to 49.0% for the year ended
December 31, 2017, exclusive of depreciation and amortization. Our drop in gross margins is mainly due to the drop in rental revenue margins due to costs
incurred in deploying units. Rental margins decreased to 54.2% for the year ended December 31, 2018 compared to 60.6% during 2017 . Sales margin
increased to 22.8% from 20.7% for the year ended 2018 compared to 2017. Third party service and maintenance margins decreased to 73.3% for the year
ended December 31, 2018 compared to 74.3% in 2017. Service and maintenance represents 2.2% of our revenue in 2018, providing minimal impact on our
overall adjusted gross margin.

Liquidity and Capital Resources

Our working capital positions as of December 31, 2019 and 2018 are set forth below.

32

 
 
 
 
 
 
 
 
 
 
Current Assets:

Cash and cash equivalents

Trade accounts receivable, net

Inventory, net

Prepaid income taxes

Prepaid expenses and other

Total current assets

Current Liabilities:

Accounts payable

Accrued liabilities

Line of credit

Current operating leases

Deferred income

Total current liabilities

Net working capital

As of December 31,

2019

2018

(in thousands)

$

11,592    $

9,106   

21,080   

40   

597   

42,415   

1,975    $

2,287   

417   

189   

640   

5,508   

$

$

36,907    $

52,628   

7,219   

30,190   

3,188   

1,696   

94,921   

2,122   

8,743   

—   

—   

81   

10,946   

83,975   

For the year ended December 31, 2019, we invested approximately $69.9 million in rental equipment, property and other equipment. During the
year, the Company added $63.7 million in new equipment to our rental fleet, $3.8 million in payments related to the construction of our new corporate
office, and $2.4 million in vehicles, office furniture and equipment. Our investment in property and equipment includes any changes to work-in-progress
related to our rental fleet jobs at the beginning of the year compared to the end of the year. Our rental work-in-progress decreased by $2.7 million during
2019. We financed our investment in rental equipment, property and other equipment with cash on hand during 2019.  

Cash flows

At December 31, 2019, we had cash and cash equivalents of $11.6 million compared to $52.6 million at year end 2018. Our cash flow from
operations of $29.4 million was offset by capital expenditures of $69.9 million during 2019. We also had working capital of $36.9 million at December 31,
2019 compared to $84.0 million at December 31, 2018. On December 31, 2019 and 2018, we had outstanding debt of $417,000, which is all related to our
line  of  credit.  We  had  net  cash  flow  from  operating  activities  of  $29.4  million  during  2019  compared  $23.7  million  during  2018.  Our  cash  flow  from
operating activities of $29.4 million was primarily the result adding back non-cash items of depreciation of $23.3 million, a goodwill impairment charge of
$10.0  million,  an  increased  inventory  allowance  and  write-off  of  $3.8  million,  stock-based  compensation  of  $2.6  million,  a  loss  on  retirement  of  rental
equipment  of  $1.5  million,  a  bad  debt  allowance  of  $0.7  million,  and  a  net  positive  change  in  working  capital  and  various  other  items  of  $2.1  million.
These positive impacts were partially offset by a net loss of $13.9 million and a decrease in cash flows related to a reduction in deferred income taxes of
$0.7 million.

At December 31, 2018, we had cash and cash equivalents of $52.6 million, working capital of $84.0 million and total debt of $417,000, under
our credit agreement which is due in 2020. Our cash and cash equivalents decreased from 2017, due to an increase on our capital program for contracted
new  large  horsepower  compressor  builds  and  the  construction  of  our  new  corporate  office.  We  had  positive  net  cash  flow  from  operating  activities  of
approximately $23.7 million during 2018. This was primarily from a net loss of $0.5 million and non-cash items of depreciation and amortization of $22.1
million,  $2.6  million  related  to  stock-based  compensation,  a  decrease  in  deferred  income  taxes  of  $0.3  million  and  a  decrease  in  cash  flows  related  to
working capital and other items of $0.2 million.

Contractual Obligations and Commitments

We have contractual obligations and commitments that affect our results of operations, financial condition and liquidity.  The following table is

a summary of our significant cash contractual obligations (in thousands):

33

 
 
 
  
 
Cash Contractual Obligations

2020

2021

2022

2023

2024

Thereafter

Total

Line of credit

Interest on line of credit

Purchase obligations

Lease liabilities (including interest)

Other long term liabilities

Total

$

417    $

—    $

—    $

—    $

—    $

—    $

17   

250   

208   

—   

—   

250   

172   

—   

—   

160   

46   

41   

—   

—   

38   

—   

—   

—   

38   

—   

—   

—   

168   

—   

417   

17   

660   

670   

41   

$

892    $

422    $

247    $

38    $

38    $

168    $

1,805   

The Company also has a remaining contractual obligation related to the construction of a new corporate office of approximately $375,000, which

we intend to finance with cash on hand. Construction of a new office began in late 2017 and was completed in 2019.

Senior Bank Borrowings

We have a senior secured revolving credit agreement the ("Amended Credit Agreement") with JP Morgan Chase Bank, N.A (the "Lender") with an
aggregate  commitment  of  $30  million,  subject  to  collateral  availability.  We  also  have  a  right  to  request  from  the  Lender,  on  an  uncommitted  basis,  an
increase of up to $20 million on the aggregate commitment (which could potentially increase the commitment amount to $50 million).

Borrowing Base.  At  any  time  before  the  maturity  of  the  Amended  Credit  Agreement,  we  may  draw,  repay  and  re-borrow  amounts  available  under  the
borrowing  base  up  to  the  maximum  aggregate  availability  discussed  above.  Generally,  the  borrowing  base  equals  the  sum  of  (a)  80%  of  our  eligible
accounts receivable plus (b) 50% of the book value of our eligible general inventory (not to exceed 50% of the commitment amount at the time) plus (c)
75% of the book value of our eligible equipment inventory.  JPMorgan Chase Bank (the “Lender”) may adjust the borrowing base components if material
deviations in the collateral are discovered in future audits of the collateral.

Interest and Fees.  Under the terms of the Amended Credit Agreement, we have the option of selecting the applicable variable rate for each revolving loan,
or portion thereof, of either (a) LIBOR multiplied by the Statutory Reserve Rate (as defined in the Amended Credit Agreement), with respect to this rate,
for Eurocurrency funding, plus the Applicable Margin (“LIBOR-based”), or (b) CB Floating Rate, which is the Lender’s Prime Rate less the Applicable
Margin; provided, however, that no more than three LIBOR-based borrowings under the agreement may be outstanding at any one time. For purposes of
the LIBOR-based interest rate, the Applicable Margin is 1.50%. For purposes of the CB Floating Rate, the Applicable Margin is 1.25%. Accrued interest is
payable monthly on outstanding principal amounts, provided that accrued interest on LIBOR-based loans is payable at the end of each interest period, but
in no event less frequently than quarterly. In addition, fees and expenses are payable in connection with our requests for letters of credit (generally equal to
the Applicable Margin for LIBOR-related borrowings multiplied by the face amount of the requested letter of credit) and administrative and legal costs.

Maturity. The maturity date of the Amended Credit Agreement is December 31, 2020, at which time all amounts borrowed under the agreement will be due
and outstanding letters of credit must be cash collateralized. The agreement may be terminated early upon our request or the occurrence of an event of
default.

Security.  The  obligations  under  the  Amended  Credit  Agreement  are  secured  by  a  first  priority  lien  on  all  of  our  inventory  and  accounts  and  leases
receivables, along with a first priority lien on a variable number of our leased compressor equipment the book value of must be maintained at a minimum
of  2.00  to  1.00  commitment  coverage  ratio  (such  ratio  being  equal  to  (i)  the  amount  of  the  borrowing  base  as  of  such  date  to  (ii)  the  amount  of  the
commitment as of such date.)

Covenants. The Amended Credit Agreement contains customary representations and warranties, as well as covenants which, among other things, limit our
ability  to  incur  additional  indebtedness  and  liens;  enter  into  transactions  with  affiliates;  make  acquisitions  in  excess  of  certain  amounts;  pay  dividends;
redeem or repurchase capital stock or senior notes; make investments or loans; make negative pledges; consolidate, merge or effect asset sales; or change
the nature of our business. In addition, we also have certain financial covenants that require us to maintain a leverage ratio less than or equal to 2.50 to 1.00
as of the last day of each fiscal quarter.

Events of Default and Acceleration. The Amended Credit Agreement contains customary events of default for credit facilities of this size and type, and
includes,  without  limitation,  payment  defaults;  defaults  in  performance  of  covenants  or  other  agreements  contained  in  the  transaction  documents;
inaccuracies in representations and warranties; certain defaults, termination events or

34

 
 
 
 
 
 
 
similar  events;  certain  defaults  with  respect  to  any  other  Company  indebtedness  in  excess  of  $50,000;  certain  bankruptcy  or  insolvency  events;  the
rendering of certain judgments in excess of $150,000; certain ERISA events; certain change in control events and the defectiveness of any liens under the
secured revolving credit agreement. Obligations under the Amended Credit Agreement may be accelerated upon the occurrence of an event of default.

As of December 31, 2019, we were in compliance with all covenants in our Amended Credit Agreement.  A default under our Amended Credit
Agreement could trigger the acceleration of our bank debt so that it is immediately due and payable.  Such default would have a material adverse effect on
our liquidity, financial position and operations if we were to borrow a significant amount under our facility.

Components of Our Principal Capital Expenditures

Capital expenditures for the three years ended December 31:

Rental equipment and property and equipment

$

69,938    $

40,065    $

13,536   

Expenditure Category

2019

2018

2017

(in thousands)

The level of our expenditures will vary in future periods depending on energy market conditions and other related economic factors.  Based upon
existing economic and market conditions, we believe that our cash on hand, operating cash flow and available line of credit are adequate to fully fund our
net capital expenditures requirements for 2020.  We also believe we have flexibility with respect to our financing alternatives and adjustments to our capital
expenditure plans if circumstances warrant. We do not have any material continuing commitments related to our current operations that cannot be met with
our cash on hand and our line of credit. However, our financing capacity could be negatively impacted by the COVID-19 pandemic. Please see Note 19 of
our Consolidated Financial Statements and Item 1A, Risk Factors, of this report.

Off-Balance Sheet Arrangements

From  time-to-time,  we  enter  into  off-balance  sheet  arrangements  and  transactions  that  can  give  rise  to  off-balance  sheet  obligations.  As  of
December 31, 2019, we have an off-balance sheet arrangement and transaction.  We do not believe that this arrangement is reasonably likely to materially
affect our liquidity or availability of, or requirements for, capital resources.

We entered into a purchase agreement with a vendor in July 2008 pursuant to which we agreed to purchase up to $4.8 million of our paint and
coating  requirements  exclusively  from  the  vendor.    In  connection  with  the  execution  of  the  agreement,  the  vendor  paid  us  a  $300,000  fee  which  is
considered to be a discount toward future purchases from the vendor.  As of December 31, 2019, we had met $4.1 million of this obligation.  The $300,000
payment we received is recorded as a long-term liability and will decrease as the purchase commitment is fulfilled.  The long-term liability remaining as of
December 31, 2019 was $41,000.

Recently Issued Accounting Pronouncements

See Notes to Consolidated Financial Statements on page F-12.

Environmental Regulations

Various federal, state and local laws and regulations covering the discharge of materials into the environment, or otherwise relating to protection of
human  safety  and  health  and  the  environment,  affect  our  operations  and  costs.    Compliance  with  these  laws  and  regulations  could  cause  us  to  incur
remediation  or  other  corrective  action  costs  or  result  in  the  assessment  of  administrative,  civil  and  criminal  penalties  and  the  issuance  of  injunctions
delaying or prohibiting operations.  In addition, we have acquired certain properties and plant facilities from third parties whose actions with respect to the
management and disposal or release of hydrocarbons or other wastes were not under our control.  Under environmental laws and regulations, we could be
required  to  remove  or  remediate  wastes  disposed  of  or  released  by  prior  owners.    In  addition,  we  could  be  responsible  under  environmental  laws  and
regulations for properties and plant facilities we lease, but do not own.  Compliance with such laws and regulations increases our overall cost of business,
but has not had a material adverse effect on our operations or financial condition.  It is not anticipated, based on current laws and regulations, that we will
be required in the near future to expend amounts that are material in relation to our total expenditure budget in order to comply with environmental laws
and regulations but such laws and regulations are frequently changed and we are unable to predict the ultimate cost of

35

 
 
compliance.  We also could incur costs related to the cleanup of sites to which we send equipment and for damages to natural resources or other claims
related to releases of regulated substances at such sites.

ITEM 7A.  QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK

Commodity Risk

Our  commodity  risk  exposure  is  the  pricing  applicable  primarily  to  oil  production  and  to  lesser  extent    natural  gas  production.  Realized
commodity prices received for such production are primarily driven by the prevailing worldwide price for crude oil and spot prices applicable to natural
gas.  Depending on the market prices of oil and natural gas, companies exploring for such resources may cancel or curtail their drilling programs, thereby
reducing demand for our equipment and services.

Financial Instruments and Debt Maturities

Our financial instruments consist of cash and cash equivalents, trade receivables, accounts payable and our line of credit.  The carrying amounts
of cash and cash equivalents, trade receivables, and accounts payable approximate fair value because of the short-term nature of the instruments.  The fair
value  of  our  bank  borrowings  approximate  the  carrying  amounts  as  of  December  31,  2019  and  2018,  and  were  determined  based  upon  interest  rates
currently available to us.

Customer Credit Risk

We  are  exposed  to  the  risk  of  financial  non-performance  by  our  customers.    Our  ability  to  collect  on  rentals  and  sales  to  our  customers  is
dependent on the liquidity of our customer base.  To manage customer credit risk, we monitor credit ratings of our customers.  Unless we are able to retain
our  existing  customers,  or  secure  new  customers  if  we  lose  one  or  more  of  our  significant  customers,  our  revenue  and  results  of  operations  would  be
adversely affected. At December 31, 2019, we had one customer that accounted for a total of approximately 35% of our accounts receivable.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

Our consolidated financial statements and supplementary financial data are included in this Annual Report on Form 10-K beginning on page F-

1.

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None.

ITEM 9A. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

An evaluation was carried out under the supervision and with the participation of our management, including our President and Chief Executive
Officer and our Vice President and Chief Financial Officer, of the effectiveness of the design of our “disclosure controls and procedures” (as such term is
defined  in  Rules  13a-15(e)  and  15d-15(e)  under  the  Securities  Exchange  Act  of  1934,  as  amended  or,  the  “Exchange  Act”)  as  of  December  31,  2019,
pursuant to Exchange Act Rule 13a-15.In designing and evaluating our disclosure controls and procedures, we recognize that any controls and procedures,
no  matter  how  well  designed  and  operated,  can  provide  only  reasonable  assurance  of  achieving  the  desired  control  objectives,  and  our  management
necessarily  applies  its  judgment  in  evaluating  and  implementing  possible  controls  and  procedures.  Based  upon  that  evaluation,  the  President  and  Chief
Executive  Officer  and  our  Vice  President  and  Chief  Financial  Officer  concluded  that,  as  of  the  end  of  the  period  covered  by  this  report,  our  disclosure
controls and procedures were not effective due to material weaknesses in internal control over financial reporting discussed below in Management’s Annual
Report on Internal Control Over Financial Reporting.

Management’s Report on Internal Control Over Financial Reporting

Our management, including the President and Chief Executive Officer and our Principal Accounting Officer, is responsible for establishing and

maintaining adequate internal control over financial reporting, as defined in Rule 13a-15(f) and

36

 
15d-15(f) under the Exchange Act.  Our internal control system is designed to provide reasonable assurance regarding the reliability of financial reporting
and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles.  Our internal control over
financial reporting includes those policies and procedures that:

•

•

•

pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of our assets;

provide  reasonable  assurance  that  transactions  are  recorded  as  necessary  to  permit  preparation  of  financial  statements  in  accordance  with
accounting principles generally accepted in the United States of America, and that our receipt and expenditures are being made only in accordance
with authorizations of management and our Board of Directors; and

provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could have
a material effect on the financial statements.

All internal control systems, no matter how well designed, have inherent limitations.  A system of internal control may become inadequate over
time  because  of  changes  in  conditions  or  deterioration  in  the  degree  of  compliance  with  the  policies  or  procedures.    Therefore,  even  those  systems
determined to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation.

A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting, such that there is a reasonable

possibility that a material misstatement of our annual or interim financial statements will not be prevented or detected on a timely basis.

Management, including our President and Chief Executive Officer and our Vice President and Chief Financial Officer, assessed the effectiveness
of the Company’s internal control over financial reporting as of December 31, 2019. In making this assessment, management used the criteria set forth by
the  Committee  of  Sponsoring  Organizations  of  the  Treadway  Commission  (COSO)  in  Internal  Control—Integrated  Framework  (2013).  Based  on  this
assessment, management has concluded that our internal control over financial reporting was not effective as of December 31, 2019, due to the material
weaknesses in our internal control over financial reporting discussed below.

Material Weaknesses in Internal Control over Financial Reporting

During  the  fourth  quarter  of  fiscal  year  2018,  we  identified  a  material  weakness  in  internal  controls  over  financial  reporting  related  to  our
accounting and reporting of income tax (expense) benefit and consolidated balance sheet and the consolidated operations statement accounts. We did not
design  and  maintain  an  effective  control  environment  with  formal  accounting  policies  and  controls  to  adequately  provide  sufficient  information  for  the
preparation of our tax provision to our third party tax professionals and did not provide an appropriate level or sufficient review of the tax provision. The
material weakness created a reasonable possibility that there could be a material misstatement of our annual or interim financial statements.

This material weakness resulted in an immaterial misstatement in the provision for income taxes in our consolidated financial statement as of and
for  the  years  ended  December  31,  2017,  2016  and  2015.  Consolidated  financial  statements  included  in  our  Annual  Report  on  Form  10-K  issued  as  of
December 31, 2018 reflect the correction of this misstatement of income tax (expense) benefit, the related consolidated balance sheet and the consolidated
operations statement accounts.

We  have  undergone  evaluations,  enhancements  and  implementation  in  our  internal  controls  over  financial  reporting  to  address  the  identified
material weakness. We have implemented various changes and enhancements to improve our controls related to the material weakness. Nevertheless, after
testing, our improved controls were not considered remediated at year end 2019, so further changes will need to be implemented. Management expects this
material weakness to be remediated by the end of 2020.

During the fourth quarter of fiscal year 2019, we identified another material weakness in internal controls over financial reporting related to our
accounting and reporting of compressor "make-ready" jobs, as well as various other compressor maintenance jobs, that were inappropriately capitalized,
resulting in immaterial increases to the Company’s cost of rentals and, to a much lesser extent, depreciation expense in prior periods. These increases in
operating costs and expenses were immaterial to all prior annual and interim periods, but would have been material to the fourth quarter of 2019 if these
cumulative  operating  costs  and  expenses  were  taken  as  an  out-of-period  adjustment.  As  detailed  in  Notes  2,  17  and  18  of  the  Company’s  financial
statements for the year ended December 31, 2019 in this Annual Report on Form 10-K, the Company has revised its prior period financial statements to
reflect these additional operating costs and expenses.

37

We did not design and maintain an effective control environment with formal accounting policies and controls to adequately provide sufficient
information to report these expenses in a timely manner. The material weakness created a reasonable possibility that there could be a material misstatement
of our annual or interim financial statements.

Management plans to address the control deficiency that led to this material weakness during 2019. Our plan is to perform an in-depth review over
controls regarding reporting of “make-ready” and other compressor maintenance jobs. This review may involve external experts. Management expect this
material weakness to be remediated by the end of 2020.

Report Over Internal Controls

Pursuant to the Section 404 of the Sarbanes-Oxley Act of 2002, we have included a report of management's assessment of the effectiveness of our
internal controls as part of this annual report on Form 10-K for the fiscal year December 31, 2019. BDO USA, LLP, our independent registered public
accounting firm, has issued an attestation report dated March 31, 2020 on the effectiveness of internal control over financial reporting on page 40 of this
report.

Changes in Internal Control Over Financial Reporting

Except for the control deficiencies discussed, there were no changes in our internal control over financial reporting that occurred during the year
ended December 31, 2019, that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting. We will
continue to review and document our disclosure controls and procedures, including our internal control over financial reporting, and may from time to time
make changes aimed at enhancing their effectiveness and to ensure that our systems evolve with our business.

ITEM 9B. OTHER INFORMATION

None.

38

Report of Independent Registered Public Accounting Firm

Board of Directors and Stockholders
Natural Gas Services Group, Inc.
Midland, Texas

Opinion on Internal Control over Financial Reporting

We have audited Natural Gas Services Group, Inc.’s (the “Company”) internal control over financial reporting as of December 31, 2019, based on criteria
established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (the
“COSO  criteria”).  In  our  opinion,  the  Company  did  not  maintain,  in  all  material  respects,  effective  internal  control  over  financial  reporting  as  of
December 31, 2019, based on the COSO criteria. We do not express an opinion or any other form of assurance on management's statements referring to any
corrective actions taken by the Company after the date of management's assessment.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (“PCAOB”), the consolidated
balance sheets of the Company as of December 31, 2019 and 2018, the related consolidated statements of operations, stockholders’ equity, and cash flows
for each of the three years in the period ended December 31, 2019, and the related notes, and our report dated March 31, 2020 expressed an unqualified
opinion thereon.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of
internal control over financial reporting, included in the accompanying Item 9A, Management’s Report on Internal Control over Financial Reporting. Our
responsibility  is  to  express  an  opinion  on  the  Company’s  internal  control  over  financial  reporting  based  on  our  audit.  We  are  a  public  accounting  firm
registered  with  the  PCAOB  and  are  required  to  be  independent  with  respect  to  the  Company  in  accordance  with  U.S.  federal  securities  laws  and  the
applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit of internal control over financial reporting in accordance with the standards of the PCAOB. Those standards require that we plan
and  perform  the  audit  to  obtain  reasonable  assurance  about  whether  effective  internal  control  over  financial  reporting  was  maintained  in  all  material
respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and
testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audit also included performing such other
procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility
that a material misstatement of a company’s annual or interim financial statements will not be prevented or detected on a timely basis. Material weaknesses
regarding management’s failure to design and maintain controls over accounting for income taxes, as well as accounting for "make-ready" jobs and various
other  compressor  maintenance  jobs,  has  been  identified  and  described  in  management’s  assessment.  These  material  weaknesses  were  considered  in
determining the nature, timing, and extent of audit tests applied in our audit of the 2019 financial statements, and this report does not affect our report dated
March 31, 2020 on those financial statements.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting
and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control
over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly
reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit
preparation  of  financial  statements  in  accordance  with  generally  accepted  accounting  principles,  and  that  receipts  and  expenditures  of  the  company  are
being  made  only  in  accordance  with  authorizations  of  management  and  directors  of  the  company;  and  (3)  provide  reasonable  assurance  regarding
prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial
statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of
effectiveness  to  future  periods  are  subject  to  the  risk  that  controls  may  become  inadequate  because  of  changes  in  conditions,  or  that  the  degree  of
compliance with the policies or procedures may deteriorate.

/s/ BDO USA, LLP
Austin, Texas
March 31, 2020

39

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

PART III

The  information  required  by  this  item  is  incorporated  herein  by  reference  to  the  sections  “Election  of  Directors,”    “Executive  Officers,”
“Corporate Governance” and “The Board of Directors and its Committees” in our definitive proxy statement which will be filed with the Securities and
Exchange Commission within 120 days after December 31, 2019 or as such period may be extended by action of the Securities and Exchange Commission.

We have adopted a Code of Business Conduct and Ethics that applies to our directors, officers and employees. The Code of Business Conduct
and Ethics is posted in the "Investor Relations" section of our website at www.ngsgi.com. The Code of Business Conduct and Ethics maybe obtained free
of charge by writing before to Natural Gas Services Group, Inc., Attn: Investor Relations, 404 Veterans Airpark Lane, Ste 300 Midland, TX 79705.

ITEM 11. EXECUTIVE COMPENSATION

The  information  required  by  this  item  is  incorporated  herein  by  reference  to  the  section  “Executive  Compensation”  in  our  definitive  proxy
statement which will be filed with the Securities and Exchange Commission within 120 days after December 31, 2019 or as such period may be extended
by action of the Securities and Exchange Commission.

ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER

MATTERS

The  information  required  by  this  item  is  incorporated  herein  by  reference  to  the  section  “Principal  Shareholders  and  Security  Ownership  of
Management” in our definitive proxy statement which will be filed with the Securities and Exchange Commission within 120 days after December 31,
2019 or as such period may be extended by action of the Securities and Exchange Commission.

ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

The  information  required  by  this  item  is  incorporated  herein  by  reference  to  the  sections  “Related  Person  Transactions”  and  “Corporate
Governance” in our definitive proxy statement which will be filed with the Securities and Exchange Commission within 120 days after December 31, 2019
or as such period may be extended by action of the Securities and Exchange Commission.

ITEM 14.  PRINCIPAL ACCOUNTING FEES AND SERVICES

The  information  required  by  this  item  is  incorporated  herein  by  reference  to  the  section  “Principal  Accounting  Fees  and  Services”  in  our
definitive proxy statement which will be filed with the Securities and Exchange Commission within 120 days after December 31, 2019 or as such period
may be extended by action of the Securities and Exchange Commission.

40

PART IV

ITEM 15. EXHIBITS AND CONSOLIDATED FINANCIAL STATEMENTS

The following documents are filed as part of this Annual Report on Form 10-K:

(a)(1) and (a)(2) Consolidated Financial Statements

For a list of Consolidated Financial Statements, see “Index to Consolidated Financial Statements” incorporated herein by reference.

(a)(3) Exhibits

A list of exhibits to this Annual Report on Form 10-K is set forth below:

Exhibit No.                                                                           Description

3.1

3.2

10.1

10.2

10.3

10.4

10.5

10.6

10.7

10.8

10.9

Articles of Incorporation, as amended (Incorporated by reference to Exhibit 3.1 of the 10-QSB filed and dated November 10, 2004).

Bylaws, as amended (Incorporated by reference to Exhibit 3.11 of the Registrant's Current Report on Form 8-K filed with the Securities and
Exchange Commission on June 21, 2016.)
Lease Agreement, dated January 9, 2018, between WNB Tower, LTD and Natural Gas Services Group, Inc. (Incorporated by reference to
Exhibit 10.15 of the Registrant’s  Form 10-K for the fiscal year ended December 31, 2017 and filed with the Securities and Exchange
Commission on March 9, 2018.)
2009 Restricted Stock/Unit Plan, as amended (Incorporated by reference to Exhibit 99.1 of the Registrant’s Current Report on Form 8-K
dated June 3, 2014 and filed with the Securities and Exchange Commission on June 6, 2014.)

Stock Option Plan, as amended and restated (Incorporated by reference to Exhibit 10.1 of the Registrant’s Current Report on Form 8-K filed
with the Securities and Exchange Commission on June 21, 2016.)

Credit Agreement between Natural Gas Services Group, Inc. and JPMorgan Chase Bank, N.A., dated December 10, 2010 (Incorporated by
reference to Exhibit 10.1 of the Registrant’s Current Report on Form 8-K filed with the Securities and Exchange Commission on November
24, 2014.)
Fifth Amendment of Credit Agreement between Natural Gas Services Group, Inc. and JPMorgan Chase Bank, N.A., dated August 31, 2017
(Incorporated by reference to Exhibit 10.2 of the Registrant's Current report on Form 8-K filed with the Securities and Exchange
Commission on September 7, 2017.)
Security Agreement between Natural Gas Services Group, Inc. and JPMorgan Chase Bank, N.A., dated December 10, 2010 (Incorporated by
reference to Exhibit 10.2 of the Registrant’s Current Report on Form 8-K filed with the Securities and Exchange Commission on December
16, 2011.)
Fourth Security Agreement between Natural Gas Services Group, Inc. and JPMorgan Chase Bank, N.A., dated August 31, 2017
(Incorporated by reference to Exhibit 10.1 of the Registrant’s Current Report on Form 8-K filed with the Securities and Exchange
Commission on September 7, 2017.)
Promissory Note in the aggregate amount of $30,000,000 issued to JPMorgan Chase Bank, N.A., dated August 31, 2017, in connection with
the revolving credit line under the Credit Agreement with JPMorgan Chase Bank, N.A. (Incorporated by reference to Exhibit 10.3 of the
Registrant’s Current Report on Form 8-K filed with the Securities and Exchange Commission on September 7, 2017.)
Amended and restated Employment Agreement dated April 27, 2015 between Natural Gas Services Group, Inc. and Stephen C. Taylor
(Incorporated by reference to Exhibit 10.1 of the Registrant’s Current Report on Form 8-K filed with the Securities and Exchange
Commission on April 29, 2015.)

10.10

The Executive Nonqualified Excess Plan Adoption Agreement, referred to as the Nonqualified Deferred Compensation Plan (Incorporated
by reference to Exhibit 10.11 of the Registrant's Quarterly report on Form 10-Q filed with the Securities and Exchange Commission on May
6, 2016.)

41

 
10.11

*21.1

*23.1

*31.1

*31.2

*32.1

*32.2

Annual Incentive Bonus Plan (Incorporated by reference to Exhibit 10.1 of the Registrant's Current Report on Form 8-K filed with the
Securities and Exchange Commission on December 18, 2012.)
Subsidiaries of the registrant
Consent of BDO USA, LLP

Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

Certification of Principal Accounting Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Certification of Principal Accounting Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

101.INS

XBRL Instance Document

101.SCH

XBRL Taxonomy Extension Schema Document

101.CAL

XBRL Taxonomy Extension Calculation Linkbase Document

101.DEF

XBRL Taxonomy Extension Definition Linkbase Document

101.LAB

XBRL Taxonomy Extension Label Linkbase Document

101.PRE

XBRL Taxonomy Extension Presentation Linkbase Document

 * Filed herewith.

ITEM 16.  FORM 10-K SUMMARY

None.

42

Pursuant  to  the  requirements  of  Section  13  or  15(d)  of  the  Securities  Exchange  Act  of  1934,  the  registrant  has  duly  caused  this  report  to  be

signed on its behalf by the undersigned, thereunto duly authorized.

SIGNATURES

Date:  March 31, 2020

NATURAL GAS SERVICES GROUP, INC.

By:

/s/ Stephen C. Taylor

Stephen C. Taylor

Chairman of the Board, President and Chief Executive Officer

(Principal Executive Officer)

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of

the registrant and in the capacities and on the dates indicated:

Signature

/s/ Stephen C. Taylor

Stephen C. Taylor

/s/ James R. Lawrence

James R. Lawrence

/s/ Charles G. Curtis

Charles G. Curtis

/s/ William F. Hughes, Jr.

William F. Hughes, Jr.

/s/ David L. Bradshaw

David L. Bradshaw

/s/ John W. Chisholm

John W. Chisholm

Title

Date

Chairman of the Board of Directors, Chief Executive Officer and
President (Principal Executive Officer)

March 31, 2020

Vice President and Chief Financial Officer (Principal Accounting
Officer)

March 31, 2020

March 31, 2020

March 31, 2020

March 31, 2020

March 31, 2020

Director

Director

Director

Director

43

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

Report of Independent Registered Public Accounting Firm

Consolidated Balance Sheets as of December 31, 2019 and 2018

Consolidated Statements of Operations for the Years Ended December 31, 2019, 2018 and 2017

Consolidated Statements of Stockholders' Equity for the Years Ended December 31, 2019, 2018 and 2017

Consolidated Statements of Cash Flows for the Years Ended December 31, 2019, 2018 and 2017

Notes to Consolidated Financial Statements

Page

1

2

3

4

5

6

 
 
 
 
 
 
 
 
 
 
 
 
 
Report of Independent Registered Public Accounting Firm

Board of Directors and Stockholders
Natural Gas Services Group, Inc.
Midland, Texas

Opinion on the Consolidated Financial Statements

We have audited the accompanying consolidated balance sheets of Natural Gas Services Group, Inc. (the “Company”) as of December 31, 2019 and 2018,
the related consolidated statements of operations, stockholders’ equity, and cash flows for each of the three years in the period ended December 31, 2019,
and  the  related  notes  (collectively  referred  to  as  the  “consolidated  financial  statements”).  In  our  opinion,  the  consolidated  financial  statements  present
fairly, in all material respects, the financial position of the Company at December 31, 2019 and 2018, and the results of its operations and its cash flows for
each  of  the  three  years  in  the  period  ended  December  31,  2019,  in  conformity  with  accounting  principles  generally  accepted  in  the  United  States  of
America.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (“PCAOB”), the Company's
internal control over financial reporting as of December 31, 2019, based on criteria established in Internal Control - Integrated Framework (2013) issued
by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”) and our report dated March 31, 2020 expressed an adverse opinion
thereon.

Basis for Opinion

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s
consolidated financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with
respect  to  the  Company  in  accordance  with  the  U.S.  federal  securities  laws  and  the  applicable  rules  and  regulations  of  the  Securities  and  Exchange
Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud.

Our audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or
fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and
disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by
management, as well as evaluating the overall presentation of the consolidated financial statements. We believe that our audits provide a reasonable basis
for our opinion.

/s/ BDO USA, LLP

We have served as the Company's auditor since 2010.

Austin, Texas
March 31, 2020

F - 1

NATURAL GAS SERVICES GROUP, INC.
CONSOLIDATED BALANCE SHEETS
(in thousands)

Current Assets:

Cash and cash equivalents

ASSETS

Trade accounts receivable, net of allowance for doubtful accounts of $918 and $291, respectively
Inventory

Prepaid income taxes

Prepaid expenses and other

Total current assets

Long-Term Inventory, net of allowance for obsolescence of $24 and $19, respectively

Rental equipment, net of accumulated depreciation of $162,348 and $165,459, respectively

Property and equipment, net of accumulated depreciation of $12,847 and $11,570, respectively

Right of use assets - operating leases, net of accumulated amortization $158
Goodwill

Intangibles, net of accumulated amortization of $1,883 and $1,758, respectively
Other assets

December 31,

2019

2018

$

11,592    $

9,106   

21,080   

40   

597   

42,415   

1,068   

217,742   

21,869   

604   

—   

1,276   

1,603   

52,628   

7,219   

30,190   

3,188   

1,696   

94,921   

3,980   

176,106   

16,644   

—   

10,039   

1,401   

1,109   

286,577    $

304,200   

Total assets

Current Liabilities:

Accounts payable

Accrued liabilities

Line of credit

LIABILITIES AND STOCKHOLDERS' EQUITY

$

$

Current operating leases

Deferred income

Total current liabilities

Line of credit

Deferred income tax liability

Long-term operating leases

Other long-term liabilities

Total liabilities

Commitments and contingencies (Notes 5, 16 and 19)

Stockholders’ Equity:

Preferred stock, 5,000 shares authorized, no shares issued or outstanding

Common stock, 30,000 shares authorized, par value $0.01; 13,178 and 13,005 shares issued, respectively
Additional paid-in capital

Retained earnings

Treasury shares, at cost, 38 shares

Total stockholders' equity

Total liabilities and stockholders' equity

1,975    $

2,287   

417   

189   

640   

5,508   

—   

31,243   

415   

1,718   

38,884   

—   

132   

110,573   

137,478   

(490)  

247,693   

2,122   

8,743   

—   

—   

81   

10,946   

417   

31,906   

—   

1,699   

44,968   

—   

130   

107,760   

151,342   

—   

259,232   

304,200   

See accompanying notes to these consolidated financial statements.

$

286,577    $

F - 2

 
 
 
 
 
 
 
 
 
NATURAL GAS SERVICES GROUP, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS
(in thousands, except earnings per share)

For the Years Ended December 31,

2019

2018

2017

Revenue:

Rental income

Sales

Service and maintenance income

Total revenue

Operating costs and expenses:

Cost of rentals, exclusive of depreciation stated separately below

Cost of sales, exclusive of depreciation stated separately below

Cost of service and maintenance, exclusive of depreciation stated separately below

Selling, general and administrative expenses

Depreciation and amortization

Impairment of goodwill

Inventory allowance

Retirement of rental equipment

Total operating costs and expenses

Operating (loss) income

Other income (expense):

Interest expense

Other income

Total other income, net

(Loss) income before income taxes:

(Provision for) benefit from income taxes:

Current

Deferred

Total income tax benefit (expense)

Net (loss) income

(Loss) earnings per share:

Basic

Diluted

Weighted average shares outstanding:

Basic

Diluted

$

56,701    $

47,766    $

19,763   

1,980   

78,444   

27,583   

16,097   

630   

10,710   

23,268   

10,039   

3,758   

1,512   

93,597   

(15,153)  

(15)  

611   

596   

(14,557)  

31   

662   

693   

16,269   

1,443   

65,478   

21,860   

12,564   

385   

9,096   

22,080   

—   

—   

—   

65,985   

(507)  

(69)  

182   

113   

(394)  

242   

(314)  

(72)  

$

$

$

(13,864)   $

(466)   $

(1.06)   $

(1.06)   $

(0.04)   $

(0.04)   $

13,114   

13,114   

12,965   

12,965   

46,046   

20,208   

1,439   

67,693   

18,160   

16,022   

370   

10,081   

21,316   

—   

273   

—   

66,222   

1,471   

(14)  

50   

36   

1,507   

(3,288)  

21,575   

18,287   

19,794   

1.54   

1.51   

12,831   

13,110   

See accompanying notes to these consolidated financial statements.

F - 3

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
NATURAL GAS SERVICES GROUP, INC.
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY
(in thousands)

Preferred Stock

Common Stock

Shares

Amount

Shares

Amount

Additional
Paid-In
Capital

Retained
Earnings

Treasury Stock

Shares

Amount

Total
Stockholders'
Equity

BALANCES, December 31, 2016

Exercise of common stock options

Compensation expense on common stock options

Issuance of restricted stock

Compensation expense on restricted common stock

Taxes paid related to net shares settlement of equity awards

Net income

BALANCES, December 31, 2017

Exercise of common stock options

Compensation expense on common stock options

Issuance of restricted stock

Compensation expense on restricted common stock

Taxes paid related to net shares settlement of equity awards

Net loss

BALANCES, December 31, 2018

Exercise of common stock options

Compensation expense on common stock options

Issuance of restricted stock

Compensation expense on restricted common stock

Taxes paid related to net shares settlement of equity awards

Purchase of treasury shares

Net loss

BALANCES, December 31, 2019

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

$

$

$

$

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

12,764   

$

128   

$

100,812   

$ 132,014   

56   

—   

60   

—   

—   

—   

—   

—   

—   

1   

—   

—   

1,120   

363   

—   

3,674   

(644)  

—   

—   

—   

—   

—   

—   

19,794   

12,880   

$

129   

$

105,325   

$ 151,808   

38   

—   

87   

—   

—   

—   

—   

—   

—   

1   

—   

—   

680   

159   

—   

2,225   

(629)  

—   

—   

—   

—   

—   

—   

(466)  

13,005   

$

130   

$

107,760   

$ 151,342   

56   

—   

117   

—   

—   

—   

—   

1   

—   

—   

1   

—   

—   

—   

505   

124   

—   

2,457   

(273)  

—   

—   

—   

—   

—   

—   

—   

—   

(13,864)  

$

$

$

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

38   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

—   

(490)  

—   

13,178   

$

132   

$

110,573   

$ 137,478   

38   

$

(490)  

$

$

$

232,954   

1,120   

363   

—   

3,675   

(644)  

19,794   

257,262   

680   

159   

—   

2,226   

(629)  

(466)  

$

259,232   

506   

124   

—   

2,458   

(273)  

(490)  

(13,864)  

247,693   

See accompanying notes to these consolidated financial statements.

F - 4

 
NATURAL GAS SERVICES GROUP, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
(in thousands)

CASH FLOWS FROM OPERATING ACTIVITIES:

Net (loss) income

Adjustments to reconcile net (loss) income to net cash provided by operating activities:

Depreciation and amortization

Deferred taxes

Gain on disposal of assets

Retirement of rental equipment

Bad debt allowance (recovery)

Inventory allowance

Impairment of goodwill

Stock-based compensation

(Gain) loss on company owned life insurance

Changes in operating assets and liabilities:

Trade accounts receivables

Inventory

Prepaid income taxes and prepaid expenses

Accounts payable and accrued liabilities

Deferred income

Other

NET CASH PROVIDED BY OPERATING ACTIVITIES

CASH FLOWS FROM INVESTING ACTIVITIES:

Purchase of rental equipment, property and other equipment

Purchase of company owned life insurance

Proceeds from insurance claim

Proceeds from sale of property and equipment

NET CASH USED IN INVESTING ACTIVITIES

CASH FLOWS FROM FINANCING ACTIVITIES:

Proceeds of other long-term liabilities

Proceeds from exercise of stock options

Purchase of treasury shares

Taxes paid related to net share settlement of equity awards

NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES

NET CHANGE IN CASH AND CASH EQUIVALENTS

CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD

CASH AND CASH EQUIVALENTS AT END OF PERIOD

SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:

Interest paid

Income taxes paid

NON-CASH TRANSACTIONS

Transfer of rental equipment to inventory

Transfer of inventory to rental equipment

Transfer of prepaids to rental equipment and inventory

Right of use asset acquired through an operating lease

For the Years Ended December 31,

2019

2018

2017

$

(13,864)   $

(466)   $

19,794   

23,268   

22,080   

(662)  

(55)  

1,512   

664   

3,758   

10,039   

2,582   

(219)  

(2,550)  

8,256   

3,288   

(7,225)  

559   

61   

314   

(69)  

—   

(185)  

—   

—   

2,385   

154   

1,500   

(5,102)  

(578)  

3,597   

(104)  

163   

29,412   

23,689   

21,316   

(21,575)  

(87)  

—   

90   

273   

—   

4,038   

(67)  

(1,246)  

(5,221)  

(1,852)  

3,410   

(2,040)  

666   

17,499   

(69,938)  

(40,065)  

(13,536)  

(302)  

35   

30   

(289)  

—   

69   

(620)  

1,231   

87   

(70,175)  

(40,285)  

(12,838)  

(16)  

506   

(490)  

(273)  

(273)  

(35)  

680   

—   

(629)  

16   

(41,036)  

52,628   

(16,580)  

69,208   

11,592    $

52,628    $

(23)  

1,120   

—   

(644)  

453   

5,114   

64,094   

69,208   

39    $

275   

14    $

85   

14   

3,725   

836   

1184   

958   

762   

144   

—   

—   

—   

55   

—   

—   

—   

$

$

See accompanying notes to these consolidated financial statements.

F - 5

 
 
 
 
  
 
 
  
 
 
 
 
 
 
 
 
 
  
 
 
NATURAL GAS SERVICES GROUP INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. Description of Business

Natural Gas Services Group, Inc. (the "Company", “NGS”, "Natural Gas Services Group", "we" or "our") (a Colorado corporation), is a leading
provider  of  natural  gas  compression  equipment  and  services  to  the  energy  industry.  The  Company  manufactures,  fabricates,  rents,  sells  and  maintains
natural gas compressors and flare systems for oil and natural gas production and plant facilities. NGS is headquartered in Midland, Texas, with fabrication
facilities  located  in  Tulsa,  Oklahoma  and  Midland,  Texas,  and  service  facilities  located  in  major  oil  and  natural  gas  producing  basins  in  the  U.S.  The
Company was formed on December 17, 1998.

2. Summary of Significant Accounting Policies

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of the Company, its subsidiary, NGSG Properties, LLC and the rabbi
trust  associated  with  the  Company’s  deferred  compensation  plan,  see  Note  10.  All  significant  intercompany  accounts  and  transactions  for  the  periods
presented have been eliminated in consolidation.

Reclassifications

Certain prior year amounts have been reclassified to conform to the current year's presentation.

Use of Estimates

The  preparation  of  our  consolidated  financial  statements  in  conformity  with  generally  accepted  accounting  principles  in  the  United  States  of
America  requires  our  management  to  make  estimates  and  assumptions  that  affect  the  amounts  reported  in  these  consolidated  financial  statements  and
accompanying  notes.    Actual  results  could  differ  from  those  estimates.    Significant  estimates  include  fixed  asset  lives,  bad  debt  allowance  and  the
allowance for inventory obsolescence. Additionally, NGS conducts a yearly review of impairment of long-lived assets. Throughout the review, determining
factors are based on estimates that can significantly impact the carrying value of these assets. It is at least reasonably possible these estimates could be
revised in the near term and the revisions could be material.

Cash Equivalents, Financial Instruments and Concentration of Credit Risks

For  purposes  of  reporting  cash  flows,  we  consider  all  short-term  investments  with  an  original  maturity  of  three  months  or  less  to  be  cash
equivalents.  We  invest  our  cash  primarily  in  deposits  and  money  market  funds  with  commercial  banks.   At  times,  cash  balances  at  banks  and  financial
institutions may exceed federally insured amounts. We believe that the risk to our cash balance is minimal because we have chosen a large bank with strong
long-term ratings of Aa2/A+.

Accounts Receivable

Our trade receivables consist of customer obligations for the sale of compressors and flare systems due under normal trade terms, and operating
leases  for  the  use  of  our  natural  gas  compressors.   The  receivables  are  not  collateralized  except  as  provided  for  under  lease  agreements.    However,  we
typically require deposits of as much as 50% or use of progress payments for large custom sales contracts.  We perform ongoing credit evaluations of our
customers  and  adjust  credit  limits  based  on  management's  assessment  of  the  customer's  financial  condition  and  payment  history,  as  well  as  industry
conditions  and  general  economic  conditions.    We  continuously  monitor  collections  and  payments  from  our  customers,  and  maintain  a  provision  for
estimated credit losses based upon our historical experience and any specific customer collection issues that we have identified.  While such credit losses
have historically been within our expectations and the provisions established, we cannot guarantee that we will continue to experience the same credit loss
rates that we have in the past.  One customer accounted for 35% and 26% of our accounts receivable as of December 31, 2019 and 2018, respectively.  A
significant  change  in  the  liquidity  or  financial  position  of  this  customer  could  have  a  material  adverse  impact  on  the  collectability  of  our  accounts
receivable and our future operating results.  The allowance for doubtful accounts was $918,000 and $291,000 at December 31, 2019 and 2018, respectively.
Management believes that the allowance is adequate; however, actual write-offs may exceed the recorded allowance.

F - 6

A summary of our allowance for doubtful accounts is as follows:

($ in thousands)

Beginning balance

Accruals

Recoveries

Write-offs

Ending balance

Revenue Recognition Policy

 Year Ended December 31,

2019

2018

2017

$

(291)  

$

(569)  

$

(664)  

—   

37   

(918)  

—   

185   

93   

(291)  

(597)  

(90)  

—   

118   

(569)  

The  Company  adopted  ASC  606,  Revenue  from  Contracts  with  Customers  ("ASC  606")  on  January,  1,  2018.  As  a  result,  the  Company  has

changed its accounting policy for revenue recognition as detailed below.

The Company applied ASC 606 using the cumulative effect method. We had no significant changes in our recognition of revenue at adoption and
our  review  of  all  open  revenue  from  contracts  with  customers  on  January  1,  2018  indicated  we  had  no  adjustment  to  be  made.  Accordingly,  our
consolidated financial statements for 2017 reported under ASC 605 are comparable to the consolidated financial statements for 2018 reported under ASC
606, since an adjustment was not needed, except for the respective additional disclosures as detailed below.

Revenue is measured based on a consideration specified in a customer’s contract, excluding any sale incentives and taxes collected on behalf of
third parties (i.e. sales and property taxes). Revenue is recognized when a customer obtains control of promised goods or services in an amount that reflects
the consideration that we expect to receive for those goods or services. To recognize revenue, we (i) identify the contract(s) with a customer; (ii) identify
the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the
contract;  and  (v)  recognize  revenue  when,  or  as,  we  satisfy  the  performance  obligation(s).  Shipping  and  handling  costs  incurred  are  accounted  for  as
fulfillment costs and are included in cost of revenues in our Consolidated Statements of Operations.

Nature of Goods and Services

The following is a description of principal activities from which the Company generates its revenue:

Rental Revenue. The Company generates revenue from renting compressors and flare systems to our customers. These contracts, which all qualify
as operating leases under ASC Topic 842, Leases (ASC 842), may also include a fee for servicing the compressor or flare during the rental contract. Our
rental contracts typically range from six to 24 months, with our larger horsepower compressors having contract terms of up to 60 months. Our revenue is
recognized over time, with equal monthly payments over the term of the contract. After the terms of the contract have expired, a customer may renew their
contract or continue renting on a monthly basis thereafter. In accordance ASC 842 – Leases, we have applied the practical expedient ASC 842-10-15-42A,
which allows the Company to combine lease and non-lease components.

Sales  Revenue.  The  Company  generates  revenue  by  the  sale  of  custom/fabricated  compressors,  flare  systems  and  parts,  as  well  as,

exchange/rebuilding customer owned compressors and sale of used rental equipment.

Custom/fabricated  compressors  and  flare  systems  -  The  Company  designs  and  fabricates  compressors  and  flares  based  on  the  customer’s
specifications outlined in their contract. Though the equipment being built is customized by the customer, control under these contracts does not pass to the
customer until the compressor or flare package is completed and shipped, or in accordance with a bill and hold arrangements the customer accepts title and
assumes the risk and rewards of ownership. We request some of our customers to make progressive payments as the product is being built; these payments
are recorded as a contract liability on the Deferred Income line on the consolidated balance sheet until control has been transferred. These contracts also
may include an assurance warranty clause to guarantee the product is free from defects in material and workmanship for a set duration of time; this is a
standard industry practice and is not considered a performance obligation.

From time to time, upon the customer’s written request, we recognize revenue when manufacturing is complete and the equipment is ready for
shipment.  At  the  customer’s  request,  we  will  bill  the  customer  upon  completing  all  performance  obligations,  but  before  shipment.  The  customer  will
formally request we ship the equipment per their direction from our manufacturing facility at a later specified date and that we segregate the equipment
from our finished goods, such that they are not available to fill other orders. Per the customer’s agreement change of control is passed to the customer once
the equipment

F - 7

is complete and ready for shipment. We have operated using bill and hold agreements with certain customers for many years, with consistent satisfactory
results for both the customer and us. The credit terms on these agreements are consistent with the credit terms on all other sales. All control is shouldered
by the customer and there are no exceptions to the customer’s commitment to accept and pay for the manufactured equipment. Revenues recognized related
to bill and hold arrangements for the years ended December 31, 2019 and 2018 was approximately $11.6 million and $8.3 million, respectively.

Parts - Revenue is recognized after the customer obtains control of the parts. Control is passed either by the customer taking physical possession or

the parts being shipped. The amount of revenue recognized is not adjusted for expected returns, as our historical part returns have been de minimis.

Exchange or rebuilding customer owned compressors - Based on the contract, the Company will either exchange a new/rebuilt compressor for the
customer’s  malfunctioning  compressor  or  rebuild  the  customer’s  compressor.  Revenue  is  recognized  after  control  of  the  replacement  compressor  has
transferred to the customer based on the terms of the contract, i.e., by physical delivery, delivery and installment, or shipment of the compressor.

Used compressors or flares - From time to time, a customer may request to purchase a used compressor or flare out of our rental fleet. Revenue
from the sale of rental equipment is recognized when the control has passed to the customer based on the terms of the contract, i.e. when the customer has
taken physical possession or the equipment has been shipped.

Service and Maintenance Revenue. The Company provides routine or call-out services on customer owned equipment. Revenue is recognized after

services in the contract are rendered.

Payment terms for sales revenue and service and maintenance revenue discussed above are generally 30 to 60 days although terms for specific

customers can vary. Also, the transaction prices are not subject to variable consideration constraints.

Disaggregation of Revenue

The following table shows the Company's revenue disaggregated by product or service type for the years ended:

Compressors - sales

Flares - sales

Other (Parts/Rebuilds) - sales
Service and maintenance

Total revenue from contracts with customers
Add: ASC 842 rental revenue

Total revenue

Year Ended December 31,

(in thousands)

2018

2019

15,185    $

10,994    $

2017

959   

3,619   

1,980   

21,743   

56,701   

2,535   

2,740   

1,443   

17,712   

47,766   

78,444    $

65,478    $

13,382   

2,755   

4,071   

1,439   

21,647   

46,046   

67,693   

$

$

F - 8

Contract Balances

As of December 31, 2019 and December 31, 2018, we had the following receivables and deferred income from contracts with customers:

Accounts Receivable

Accounts receivable - contracts with customers

Accounts receivable - ASC 842

Total Accounts Receivable

Less: Allowance for doubtful accounts

Total Accounts Receivable, net

Deferred income

December 31, 2019

December 31, 2018

(in thousands)

3,061    $

6,963   

10,024   

(918)  

9,106   

640    $

2,390   

5,120   

7,510   

(291)  

7,219   

81   

$

$

The Company recognized $48,000 in revenue for the year ended December 31, 2019 that was included in deferred income at the beginning of
2019. For the period ended December 31, 2018, the Company recognized revenue of $176,000 from amounts related to sales that were included in deferred
income at the beginning of 2018.

The increases (decreases) of accounts receivable and deferred income were primarily due to normal timing differences between our performance

and the customers’ payments.

Transaction Price Allocated to the Remaining Performance Obligations

As of December 31, 2019, the Company did not have revenue related to unsatisfied performance obligations.

Contract Costs

The Company recognizes the incremental costs of obtaining contracts as an expense when incurred if the amortization period of the assets that the
Company otherwise would have recognized is one year or less. These costs are included in selling, general and administrative expense on our Consolidated
Statements of Operations.

Leases

On January 1, 2019, we adopted ASC 842 using the modified retrospective method. We recognized the cumulative effect of initially applying the
new lease standard and had no adjustments to retained earnings. The comparative information has not been restated and continues to be reported under the
lease accounting standard in effect for those periods.

The new lease standard requires all leases to be reported on the balance sheet as right-of-use assets and lease obligations. We elected the practical
expedients  permitted  under  the  transition  guidance  of  the  new  standard  that  retained  the  lease  classification  and  initial  direct  costs  for  any  leases  that
existed prior to adoption of the standard. We did not reassess whether any contracts or land easements entered into prior to adoption are leases or contain
leases.

F - 9

The cumulative effect of the changes made to our consolidated balance sheet at January 1, 2019, for the adoption of ASC 842 was as follows (in

thousands):

Balance Sheet

Assets

Right of use assets

Liabilities

Current portion of operating leases

Long term portion of operating leases

Total lease liabilities

Balance at December
31, 2018

Adjustments due to
ASC 842

Balance at January 1,
2019

$

$

$

—    $

—    $

—   

—    $

451    $

126    $

325   

451    $

451   

126   

325   

451   

The Company, as a lessee, applies the practical expedient to not separate non-lease components from lease components, therefore, accounting for

each separate lease component and its associated non-lease component, as a single lease component.

Each lease that 1) contains the same timing and pattern of transfer for lease and non-lease components; and 2) if the lease component, if accounted

for separately, would be classified as an operating lease, the Company elects to not separate non-lease components from lease components.
Major Customers and Concentration of Credit Risk

Sales and rental income from Occidental Permian, LTD. ("Oxy") in 2019 and 2018 amounted to 36% and 28% of revenue, respectively. Sales
and  rental  income  to  Oxy  and  Devon  Energy  Production,  Inc.  in  2017  amounted  to  20%  and  15%  of  revenue,  respectively.  No  other  single  customer
accounted  for  more  than  10%  of  our  revenues  in  2019,  2018  or  2017.  Oxy's  accounts  receivable  balances  amounted  to  35%  and  26%  of  our  accounts
receivable as of December 31, 2019 and 2018, respectively. No other customers amounted to more than 10% of our accounts receivable as of December 31,
2019 and 2018.

Inventory

Inventory (current and long-term) is valued at the lower of cost and net realizable value.  The cost of inventories is determined by the weighted
average method. We regularly review inventory quantities on hand and record a provision for excess and obsolete inventory based primarily on current and
anticipated customer demand and production requirements. The Company accesses anticipated customer demand based on current and upcoming capital
expenditure budgets of its major customers as well as other significant companies in the industry, along with oil and natural gas price forecasts and other
factors affecting the industry. In addition, our long-term inventory consists of raw materials that remain viable but which the Company does not expect to
sell within the next year.

Rental Equipment and Property and Equipment

Rental  equipment  and  property  and  equipment  are  recorded  at  cost  less  accumulated  depreciation,  except  for  work-in-progress  on  new  rental
equipment which is recorded at cost until it’s complete and added to the fleet. Depreciation is computed using the straight-line method over the estimated
useful lives of the assets. Our rental equipment has an estimated useful life between 15 and 25 years, while our property and equipment has an estimate
useful lives which range from 3 to 39 years.  The majority of our property and equipment, including rental equipment, is a direct cost to generating revenue.

We  assess  the  impairment  of  rental  equipment  and  property  and  equipment  whenever  events  or  changes  in  circumstances  indicate  that  the  net
recorded amount may not be recoverable.  The following factors could trigger an impairment review: significant underperformance relative to historical or
projected future cash flows; significant adverse changes in the extent or manner in which asset (or asset group) is being used or its condition, including a
meaningful drop in fleet utilization over the prior four quarters; significant negative industry or company-specific trends or actions, including meaningful
capital expenditure budget reductions by our major customers or other sizable exploration and production or midstream companies, as well as significant
declines  in  oil  and  natural  gas  prices;  legislative  changes  prohibiting  us  from  leasing  our  units  or  flares;  or  poor  general  economic  conditions.  An
impairment loss is recognized if the future undiscounted cash flows associated with the asset (or asset group) and the estimated fair value of the asset are
less than the asset's carrying value.

F - 10

 
 
Sales  of  equipment  out  of  the  rental  fleet  are  included  with  sales  revenue  and  cost  of  sales,  while  retirements  of  units  are  shown  a  separate
operating expense. Gains and losses resulting from sales and dispositions of other property and equipment are included with other income. Maintenance
and repairs are charged to cost of rentals as incurred.
Goodwill

Goodwill represents the cost in excess of fair value of the identifiable net assets acquired. Goodwill is tested annually for impairment or as needed
upon the occurrence of certain events or substantive changes in circumstances that indicate goodwill is more likely than not impaired. As further described
in Note 6 of these financial statements, we fully impaired the Company's goodwill during the third quarter of 2019, resulting in a goodwill impairment
charge of $10.0 million for the year ended December 31, 2019.

Intangibles

At December 31, 2019 and 2018, NGS had intangible assets, which relate to developed technology and a trade name. Developed technology is
amortized on a straight-line basis with a useful life of 20 years, with a weighted average remaining life of approximately five years as of December 31,
2019.  NGS has an intangible asset related to the trade name of SCS which was acquired in our acquisition of Screw Compression Systems in January
2005.  This asset is not being amortized as it has been deemed to have an indefinite life.

Our policy is to review intangibles that are being amortized for impairment when indicators of impairment are present. In  addition,  it  is  our
policy to review indefinite-lived intangible assets for impairment annually or when indicators of impairment are present. We review intangibles through an
assessment  of  the  estimated  future  cash  flows  related  to  such  assets.    In  the  event  that  assets  are  found  to  be  carried  at  amounts  in  excess  of  estimated
undiscounted  future  cash  flows,  then  the  assets  will  be  adjusted  for  impairment  to  a  level  commensurate  with  a  discounted  cash  flow  analysis  of  the
underlying assets.  

Warranty

We accrue amounts for estimated warranty claims based upon current and historical product warranty costs and any other related information

known.  The warranty reserve was $74,000 and $22,000 for December 31, 2019 and 2018, respectively, and is included in accrued liabilities on the
consolidated balance sheet.

Income Taxes

Deferred  tax  assets  and  liabilities  are  recognized  for  the  future  tax  consequences  attributable  to  temporary  differences  between  the  financial
statement carrying amounts of assets and liabilities and their respective tax bases, and operating losses and tax credit carry-forwards.  Deferred tax assets
and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to
be recovered or settled. We assess the likelihood that our deferred tax assets will be recovered from future taxable income and, to the extent we believe that
recovery is not probable, we establish a valuation allowance.  To the extent we establish a valuation allowance or increase this allowance in a period, we
include an expense in the tax provision in the statement of income.

ASC Topic 740 prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax
position taken or expected to be taken in a tax return. In order to record any financial statement benefit, we are required to determine, based on technical
merits of the position, whether it is more likely than not (a likelihood of more than 50 percent) that a tax position will be sustained upon examination,
including resolution of any related appeals or litigation processes. If that step is satisfied, then we must measure the tax position to determine the amount of
benefit to recognize in the financial statements. The tax position is measured at the largest amount of the benefit that is greater than 50 percent likely of
being realized upon ultimate settlement.

Our policy regarding income tax interest and penalties is to expense those items as other expense.

We account for uncertain tax positions in accordance with guidance in FASB ASC 740, which prescribes the minimum recognition threshold a tax
position taken or expected to be taken in a tax return is required to meet before being recognized in the financial statements. We have no uncertain tax
positions as of December 31, 2019.

F - 11

Fair Value Measurement

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market
participants  at  the  measurement  date  under  current  market  conditions.  ASC  Topic  820  established  a  fair  value  hierarchy,  which  requires  an  entity  to
maximize the use of observable inputs when measuring fair value. These inputs are categorized as follows:

Level 1- quoted prices in an active market for identical assets or liabilities;

Level 2- quoted prices in an active market for similar assets or liabilities, inputs other than quoted prices that are observable for similar assets or liabilities,
inputs derived principally from or corroborated by observable market data by correlation or other means; and

Level 3- valuation methodology with unobservable inputs that are significant to the fair value measurement.

Management believes that the fair value of our cash and cash equivalents, trade receivables, accounts payable and line of credit at December 31, 2019 and
2018 approximate their carrying values due to the short-term nature of the instruments or the use of prevailing market interest rates. 

Segments and Related Information

ASC 280-10-50, “Operating Segments”, define the characteristics of an operating segment as a) being engaged in business activity from which
it may earn revenue and incur expenses, b) being reviewed by the company's chief operating decision maker (CODM) for decisions about resources to be
allocated and assess its performance and c) having discrete financial information.  Although we indeed look at our products to analyze the nature of our
revenue, other financial information, such as certain costs and expenses, net income and EBITDA are not captured or analyzed by these categories.  Our
CODM does not make resource allocation decisions or access the performance of the business based on these categories, but rather in the aggregate. Based
on this, management believes that it operates in one business segment.

In  their  analysis  of  product  lines  as  potential  operating  segments,  management  also  considered  ASC  280-10-50-11,  “Aggregation  Criteria”,
which allows for the aggregation of operating segments if the segments have similar economic characteristics and if the segments are similar in each of the
following areas:

•

•

•

•

•

The nature of the products and services;

The nature of the production processes;

The type or class of customer for their products and services;

The methods used to distribute their products or provide their services; and

The nature of the regulatory environment, if applicable.

We are engaged in the business of designing and manufacturing compressors and flares. Our compressors and flares are sold and rented to our
customers.  In  addition,  we  provide  service  and  maintenance  on  compressors  in  our  fleet  and  to  third  parties.  These  business  activities  are  similar  in  all
geographic areas.  Our manufacturing process is essentially the same for the entire Company and is performed in house at our facilities in Midland, Texas
and Tulsa, Oklahoma. Our customers primarily consist of entities in the business of producing natural gas.  The maintenance and service of our products is
consistent across the entire Company and is performed via an internal fleet of vehicles.  The regulatory environment is similar in every jurisdiction in that
the most impacting regulations and practices are the result of federal energy policy. In addition, the economic characteristics of each customer arrangement
are similar in that we maintain policies at the corporate level.

Recently Issued Accounting Pronouncements

On January 1, 2019, the Company adopted ASC Topic 842, Leases. We applied certain practical expedients that allow companies to not reassess
leases that are in effect prior to adoption, the practical expedient that allows lessors to not separate lease and non-lease components for certain asset classes
and the practical expedient that allows lessors to exclude third party taxes from lease revenue and lease-related expenses. Adoption of ASC 842 resulted in
an increase in lease assets and lease liabilities on the consolidated balance sheet of approximately $451,000. The adoption by the Company of ASC 842, in
regards

F - 12

 
 
 
 
to the increase in liabilities, did not impact the debt covenants on our existing line of credit, as leases are not considered new indebtedness in our credit
agreement as confirmed with our bank.

In December 2019, the FASB issued ASU 2019-12, Income Taxes (ASC Topic 740), which simplifies accounting for income taxes by removing
certain  exceptions  to  various  tax  accounting  principles  and  clarifies  other  existing  guidance  in  order  to  improve  consistency  of  application.  These
amendments are effective for public entities for interim and annual periods beginning after December 15, 2020. We are currently evaluating the impact of
ASU 2019-12 on our consolidated financial statements and note disclosures.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (ASC Topic 326): Measurement of Credit Losses on Financial
Instruments.  The  amendments  to  ASC  Topic  326  require  immediate  recognition  of  estimated  credit  losses  expected  to  occur  over  the  remaining  life  of
many financial assets, including trade receivables. For companies that qualify as smaller reporting companies, the amendments in this update are effective
for  interim  and  annual  periods  beginning  after  January  1,  2023.  We  are  currently  evaluating  the  impact  of  ASU  2016-13  on  our  consolidated  financial
statements and note disclosures.

Revisions of Prior Period Financial Statements

In conjunction with the preparation of its year-end financial statements for 2019, the Company determined that certain, immaterial operating costs
and expenses were inappropriately capitalized during the years ended December 31, 2018 and 2017, as well for interim periods in 2019 and 2018. As a
result, the Company revised its prior period financial statements to incorporate additional operating costs and expenses of $1.1 million, $1.14 million and
$96,000 for the nine months ended September 30, 2019, the year ended December 31, 2018 and the year ended December 31, 2017, respectively.

In  accordance  with  Staff  Accounting  Bulletin  (“SAB”)  No.  99,  “Materiality”,  and  SAB  No.  108,  “Considering  the  Effects  of  Prior  Year
Misstatements when Quantifying Misstatements in Current Year Financial Statements”, we evaluated the aforementioned errors and, based on an analysis
of quantitative and qualitative factors, determined that the related impact was not material to our consolidated financial statements for any prior annual or
interim period. Therefore, amendments of previously filed reports are not required. A summary of the revisions to our previously issued annual financial
statements  is  included  in  Note  18,  Revisions  of  Prior  Period  Financial  Statements.  In  addition,  a  summary  of  the  revisions  to  our  unaudited  quarterly
financial  data  is  included  in  Note  17,  Quarterly  Financial  Data  (Unaudited).  The  impacted  balances  in  the  accompanying  notes  to  these  consolidated
financial statements have also been revised accordingly.

3.  Inventory

Our  inventory,  net  of  allowance  for  obsolescence  of  $24,000  and  $19,000  at  December  31,  2019  and  2018,  respectively,  consisted  of  the

following (in thousands):

Raw materials - current

Work-in-process

Finished goods

Inventory - current

Raw materials - long term (net of allowances of $24 and $19, respectively

Inventory - total

2019

2018

$

$

19,388    $

1,692   

—   

21,080   

1,068   

22,148    $

26,152   

3,016   

1,022   

30,190   

3,980   

34,170   

There were seven newly completed compressor units available for sale in finished goods for a total of $1.0 million at December 31, 2018. These
units  were  transferred  from  inventory  to  our  rental  fleet  due  to  customer  demands  during  2019.  In  addition,  our  long-term  inventory  consists  of  raw
materials that remain viable but which the Company does not expect to sell within the next year.

Inventory Allowance

Given  its  concerns  about  the  industry  backdrop,  Company  management  determined  during  the  third  quarter  of  2019  that  an  increase  of  its
inventory allowance was necessary. Due to the slow moving nature or obsolescence of a portion of its long-term inventory and inventory related to the
retirement of rental equipment, management recorded an increase of $3.4 million to the Company's inventory allowance reserve for costs that may not be
recoverable in the future. During the

F - 13

 
fourth quarter of 2019, management identified another $408,000 of slow moving or obsolete inventory. For the year ended December 31, 2019, inventory
allowance totaled $3.8 million. We ended 2019 with an inventory allowance balance of $24,000.

A summary of our inventory allowance is as follows:

($ in thousands)

Beginning balance

Accruals

Write-offs

Ending balance

4.  Rental Equipment, Property and Equipment

Rental Equipment

Year Ended December 31,

2019

2018

2017

$

(19)  

$

(15)  

$

(3,758)  

3,753   

(24)  

(4)  

—   

(19)  

(15)  

(273)  

273   

(15)  

Our  rental  equipment  and  associated  accumulated  depreciation  as  of  December  31,  2019  and  2018,  respectively,  consisted  of  the  following  (in

thousands):

Compressor units

Work-in-progress

Rental equipment

Accumulated depreciation

Rental equipment, net of accumulated depreciation

2019

2018

$

$

370,961    $

9,129   

380,090   

(162,348)  

217,742    $

329,697   

11,868   

341,565   

(165,459)  

176,106   

Our  rental  equipment  has  an  estimated  useful  life  between  15  and  25  years.  Depreciation  expense  for  rental  equipment  was  $21.4  million,

$20.9 million and $20.0 million for the year ended December 31, 2019, 2018 and 2017, respectively.

In January 2019, the Company reviewed the estimated useful lives of its rental equipment. This review indicated that the actual lives of its larger
horsepower rental equipment were longer than the estimated useful lives used for depreciation purposes in the Company’s financial statements. These units
incorporate newer technology and heavier, more robust castings and forging, which allows for complete overhauls at longer cycles when compared to its
older, lower horsepower units. Accordingly, as of January 1, 2019, the Company changed its estimates of the useful lives of for these higher horsepower
units from 15 years to 20 years (for its 400-600 horsepower units) or 25 years (for its 1,380 horsepower units). This analysis is consistent with our peers,
which  are  depreciating  their  compressor  units  over  20  to  30  years.  The  effect  of  this  change  in  estimate  was  to  reduce  2019  depreciation  expense  by
approximately $1.47 million, decrease 2019 net loss by $1.13 million, and decrease 2019 basic and diluted loss per share by $0.09.

Retirement of Rental Equipment

Given its concerns about the current industry backdrop, Company management determined during the third quarter of 2019 which units were not
of the type, configuration, make or model that our customers are demanding or that were not cost efficient to refurbish, maintain and/or operate. As a result
of  this  review,  we  determined  327  units  should  be  retired  from  our  rental  fleet.  Accordingly,  we  recorded  a  $1.5  million  loss  on  retirement  of  rental
equipment during the year ended December 31, 2019.

During our review of our rental compressor units in 2018, we determined 13 units should be retired from our rental fleet. We recorded no loss on

this retirement, as these units were fully depreciated. We did not record any retirements from our rental fleet in 2017.

F - 14

Property and Equipment

Property and equipment consists of the following at December 31, 2019 and 2018 (in thousands):

Land

Building

Building and leasehold improvements

Office equipment and furniture

Software

Machinery and equipment

Vehicles

Construction in Progress

Total

Less accumulated depreciation

Total

Useful Lives
(Years)

2019

2018

— 

39

39

5

5

7

3

— 

  $

1,290    $

18,632   

1,168   

2,001   

573   

3,492   

7,560   

—   

34,716   

(12,847)  

$

21,869    $

1,290   

6,116   

808   

1,492   

573   

3,324   

6,292   

8,319   

28,214   

(11,570)  

16,644   

Depreciation expense for property and equipment was $1.7 million, $1.1 million and $1.2 million for the year ended December 31, 2019, 2018 and

2017, respectively.

Depreciation Expense by Product Line

The  following  table  depicts  annual  depreciation  expense  associated  with  each  product  line  as  well  as  our  corporate  activities  at  December  31,

2019, 2018 and 2017 (in thousands):

Rentals

Sales

Service & Maintenance

Corporate

Total

5. Leases

2019

2018

2017

$

22,596    $

21,611    $

20,873   

275   

37   

235   

271   

22   

50   

267   

22   

29   

$

23,143    $

21,954    $

21,191   

The Company determines if an arrangement is a lease at inception by assessing whether it conveys the right to control the use of an identified asset
for a period of time in exchange for consideration. The Company’s leases are primarily related to property leases for its field offices. The Company's leases
have  remaining  lease  terms  of  one  to  10  years.  Renewal  and  termination  options  are  included  in  the  lease  term  when  it  is  reasonably  certain  that  the
Company will exercise the option.

The Company's lease agreements do not contain any contingent rental payments, material residual guarantees or material restrictive covenants.

ROU assets and lease liabilities are recognized at the lease commencement date based on the present value of lease payments over the lease term.
As substantially all of the Company's leases do not provide an implicit rate, the Company uses its incremental borrowing rate, which is based on a fully
collateralized loan over the lease term, to determine the present value of lease payments. Based on the present value of lease payments for the Company's
existing leases, the Company recorded net lease assets and lease liabilities of approximately $451,000, respectively, upon adoption. The Company had no
finance leases. The new lease standard did not materially impact the Company's consolidated statements of income and had no impact on the Company's
consolidated statements of cash flows.

F - 15

 
 
 
The impact of the new lease standard on the December 31, 2019 consolidated balance sheet was as follows:

Classification on Consolidated Balance
Sheet

December 31, 2019

($ in thousands)

Operating lease assets

Right of use assets-operating leases

Current lease liabilities

Noncurrent lease liabilities

Total lease liabilities

Weighted average remaining lease term in years

Implicit Rate

Current operating leases

Long-term operating leases

$

$

$

604 

189 

415 

604 

2.6

3.1  %

Operating lease costs are recognized on a straight-line basis over the lease term. Total operating lease costs for the year ended December 31, 2019

was approximately $548,000.

Cash paid for amounts included in the measurement of lease liabilities

Operating lease cost (1) (2)

December 31, 2019

(in thousands)

$

548   

(1) Lease costs are classified on the Consolidated Statements of Operations in cost of sales, cost of compressors and selling, general and administrative
expenses.
(2)  Includes costs of $350,000 for leases with terms of 12 months or less and $198,000 for leases with terms greater than 12 months.

The following table shows the future maturities of lease liabilities:

Years Ending December 31,

2020

2021

2022

2023

2024

Thereafter

Total lease payments

Less: Imputed interest

Total

Lease Liabilities

(in thousands)

208   

172   

46   

38   

38   

168   

670   

(66)  

604   

$

$

F - 16

 
 
 
 
Under the previous lease standard (Topic 840), future minimum obligations under lease commitments in effect at December 31, 2018 were as follows:

2019

2020

2021

2022

2023

Thereafter

Total

Operating Leases

(in thousands)

298   

118   

97   

44   

35   

15   

607   

$

$

Rent expense under such leases was $198,000, $433,000, and $310,000 for the years ended December 31, 2019, 2018 and 2017, respectively.

6. Goodwill

Goodwill represents the cost in excess of fair value of the identifiable net assets acquired. Goodwill is tested annually for impairment or as needed
upon  the  occurrence  of  certain  events  or  substantive  changes  in  circumstances  that  indicate  goodwill  is  more  likely  than  not  impaired.  During the third
quarter of 2019, the Company examined various qualitative factors to determine if a quantitative goodwill impairment test was needed. For several months
prior  to  the  end  of  the  third  quarter  of  2019,  the  Company  experienced  a  significant  decline  in  stock  price,  which  was  reflective  of  the  significant
deterioration of stock prices of companies throughout the oilfield services sector. In addition, the Company noted its largest customer as well as several
other exploration and production companies had announced significant reductions to their 2020 capital expenditures budgets compared to those in 2019.
These  reductions  clearly  indicated  lower  demand  for  oilfield  services,  including  compression  services,  in  2020  compared  to  2019.  In  addition,  the
reductions  reflected  the  deteriorated  equity  markets  for  energy  companies  and  demands  from  institutional  investors  that  energy  companies  keep  capital
spending within operating cash flow. After considering these factors and various other industry, economic and company-specific factors, we calculated our
market  capitalization  (based  on  our  closing  stock  price)  as  of  September  30,  2019,  and  compared  it  to  the  carrying  value  of  our  net  assets.  Since  the
carrying  value  of  our  net  assets  exceeded  our  market  capitalization  and  after  considering  all  of  the  aforementioned  qualitative  factors,  Company
management determined that it was more likely than not that the fair value of the Company’s net assets was less than its carrying amount.

As a result of our qualitative assessment, we proceeded to perform our quantitative goodwill impairment analysis, where we used an independent
valuation specialist to assist us in determining the fair value of our net assets. In this impairment analysis, the estimated fair value of our net assets was
determined utilizing market and income-based approaches. Determining fair value in this analysis required significant judgment, including judgments about
appropriate  comparable  companies,  appropriate  discount  rates  and  our  estimated  future  cash  flows,  which  are  subject  to  change.  As  a  result  of  our
quantitative evaluation, we recorded a goodwill impairment charge of $10.0 million in 2019.

December 31, 2018

Impairments

December 31, 2019

$

$

Goodwill, net

10,039   

(10,039)  

—   

We experienced no impairment of goodwill during the years ended December 31, 2018 and 2017.

F - 17

7.  Intangibles

At  December  31,  2019  and  2018,  the  Company  had  intangible  assets,  which  relate  to  developed  technology  and  a  trade  name.  The  carrying
amount net of accumulated amortization at December 31, 2019 and 2018 was $1.3 million and $1.4 million, respectively. Amortization expense recognized
in each of the years ending December 31, 2019, 2018, and 2017 was $125,000. Estimated amortization expense for the years 2020-2024 is $125,000 per
year. The Company has an intangible asset with a gross carrying value of $654,000 at December 31, 2019 related to the trade name of SCS which was
acquired in our acquisition of Screw Compression Systems in January 2005.  This asset is not being amortized as it has been deemed to have an indefinite
life.

The following table represents the identified intangible assets by major asset class (in thousands):

December 31, 2019

December 31, 2018

Developed Technology

Trade Name

Total

Useful Life
(years)

20

Indefinite

Gross
Carrying
Value 

Accumulated
Amortization 

Net Book
Value 

Gross
Carrying
Value 

Accumulated
Amortization 

Net Book
Value 

$

$

2,505    $

1,883    $

654   

—   

622   

654   

3,159    $

1,883    $

1,276   

$

$

2,505    $

1,758    $

654   

—   

747   

654   

3,159    $

1,758    $

1,401   

Our policy is to review intangibles that are being amortized for impairment when indicators of impairment are present. In  addition,  it  is  our
policy to review indefinite-lived intangible assets for impairment annually or when indicators of impairment are present. We review intangibles through an
assessment  of  the  estimated  future  cash  flows  related  to  such  assets.    In  the  event  that  assets  are  found  to  be  carried  at  amounts  in  excess  of  estimated
undiscounted  future  cash  flows,  then  the  assets  will  be  adjusted  for  impairment  to  a  level  commensurate  with  a  discounted  cash  flow  analysis  of  the
underlying assets.  Based upon our analysis, we experienced no impairment of intangible assets (excluding goodwill) during the years ended December 31,
2019 or 2018.

In addition, in conjunction with our quantitative assessment of goodwill, we used the services of an independent valuation specialist to assist us in
determining the fair value of our trade name during the third quarter of 2019. In this impairment analysis, the estimated fair value of our trade name was
determined utilizing an income-based approach that required significant judgment, including those about an appropriate royalty rate and discount rate. This
analysis indicated no impairment of our trade name.

8. Credit Facility

We  have  a  senior  secured  revolving  credit  agreement  with  JP  Morgan  Chase  Bank,  N.A  (the  "Amended  Credit  Agreement")  aggregate
commitment of $30 million, subject to collateral availability. We also have a right to request from the Lender, on an uncommitted basis, an increase of up to
$20 million on the aggregate commitment (which could potentially increase the commitment amount to $50 million). .
Borrowing Base.  At  any  time  before  the  maturity  of  the  Amended  Credit  Agreement,  we  may  draw,  repay  and  re-borrow  amounts  available  under  the
borrowing  base  up  to  the  maximum  aggregate  availability  discussed  above.  Generally,  the  borrowing  base  equals  the  sum  of  (a)  80%  of  our  eligible
accounts receivable plus (b) 50% of the book value of our eligible general inventory (not to exceed 50% of the commitment amount at the time) plus (c)
75% of the book value of our eligible equipment inventory.  JPMorgan Chase Bank (the “Lender”) may adjust the borrowing base components if material
deviations in the collateral are discovered in future audits of the collateral. We had $29.5 million borrowing base availability at December 31, 2019 under
the terms of our Amended Credit Agreement.

Interest and Fees.  Under the terms of the Amended Credit Agreement, we have the option of selecting the applicable variable rate for each revolving loan,
or portion thereof, of either (a) LIBOR multiplied by the Statutory Reserve Rate (as defined in the Amended Credit Agreement), with respect to this rate,
for Eurocurrency funding, plus the Applicable Margin (“LIBOR-based”), or (b) CB Floating Rate, which is the Lender's Prime Rate less the Applicable
Margin; provided, however, that no more than three LIBOR-based borrowings under the agreement may be outstanding at any one time. For purposes of
the

F - 18

 
 
 
 
 
 
 
 
 
LIBOR-based interest rate, the Applicable Margin is 1.50%. For purposes of the CB Floating Rate, the Applicable Margin is 1.25%.

Accrued interest is payable monthly on outstanding principal amounts, provided that accrued interest on LIBOR-based loans is payable at the end
of each interest period, but in no event less frequently than quarterly. In addition, fees and expenses are payable in connection with our requests for letters
of  credit  (generally  equal  to  the  Applicable  Margin  for  LIBOR-related  borrowings  multiplied  by  the  face  amount  of  the  requested  letter  of  credit)  and
administrative and legal costs.

Maturity . The maturity date of the Amended Credit Agreement is December 31, 2020, at which time all amounts borrowed under the agreement will be
due and outstanding letters of credit must be cash collateralized. The agreement may be terminated early upon our request or the occurrence of an event of
default.

Security.  The  obligations  under  the  Amended  Credit  Agreement  are  secured  by  a  first  priority  lien  on  all  of  our  inventory  and  accounts  and  lease
receivables, along with a first priority lien on a variable number of our leased compressor equipment the book value of must be maintained at a minimum
of  2.00  to  1.00  commitment  coverage  ratio  (such  ratio  being  equal  to  (i)  the  amount  of  the  borrowing  base  as  of  such  date  to  (ii)  the  amount  of  the
commitment as of such date.)

Covenants. The Amended Credit Agreement contains customary representations and warranties, as well as covenants which, among other things, limit our
ability  to  incur  additional  indebtedness  and  liens;  enter  into  transactions  with  affiliates;  make  acquisitions  in  excess  of  certain  amounts;  pay  dividends;
redeem or repurchase capital stock or senior notes; make investments or loans; make negative pledges; consolidate, merge or effect asset sales; or change
the nature of our business. In addition, we also have certain financial covenants that require us to maintain a leverage ratio less than or equal to 2.50 to 1.00
as of the last day of each fiscal quarter.

Events of Default and Acceleration. The Amended Credit Agreement contains customary events of default for credit facilities of this size and type, and
includes, without limitation, payment defaults; defaults in performance of covenants or other agreements contained in the loan documents; inaccuracies in
representations and warranties; certain defaults, termination events or similar events; certain defaults with respect to any other Company indebtedness in
excess  of  $50,000;  certain  bankruptcy  or  insolvency  events;  the  rendering  of  certain  judgments  in  excess  of  $150,000;  certain  ERISA  events;  certain
change in control events and the defectiveness of any liens under the secured revolving credit facility. Obligations under the Amended Credit Agreement
may be accelerated upon the occurrence of an event of default.

As of December 31, 2019, we were in compliance with all covenants in our Amended Credit Agreement.  A default under our Credit Agreement
could trigger the acceleration of our bank debt so that it is immediately due and payable.  Such default would likely limit our ability to access other credit.
At  December  31,  2019  our  balance  on  the  line  of  credit  was  $417,000.  Our  weighted  average  interest  rate  for  the  year  ended  December  31,  2019  was
3.06%.

9.  Income Taxes

The (provision for) benefit from income taxes for the years ended December 31, 2019, 2018 and 2017, consists of the following (in thousands):

Current benefit (provision):

Federal benefit (expense)

State (expense) benefit

Total current benefit (provision)

Deferred benefit (provision):

Federal benefit (expense)

Total deferred benefit (expense)

Total benefit (provision)

2019

2018

2017

$

$

86    $

164    $

(55)  

31   

662   

662   

78   

242   

(314)  

(314)  

693    $

(72)   $

(3,031)  

(257)  

(3,288)  

21,575   

21,575   

18,287   

On December 22, 2017, the U.S. government enacted the 2017 Tax Act. The 2017 Tax Act made broad and complex changes to the U.S. tax code
that  affected  the  Company’s  2017  financial  results.  The  2017  Tax  Act  also  established  new  tax  laws  that  affected  the  Company’s  financial  results  after
2017,  including  a  reduction  in  the  U.S.  federal  corporate  income  tax  rate  from  35  percent  to  21  percent,  additional  limitations  on  the  deductibility  of
executive compensation, limitations on the

F - 19

 
 
 
 
 
 
 
 
 
 
 
deductibility of interest, and repeal of the domestic manufacturing deduction. As such, the Company recognized a $18.4 million income tax benefit related
to the re-measurement of our deferred tax assets and liabilities in our 2017 financial statements in accordance with SAB 118, which provides SEC staff
guidance for the application of ASC 740 in the reporting period in which the 2017 Tax Act was signed into law. We completed our detailed analysis in 2018
with no material adjustments.

The income tax effects of temporary differences that give rise to significant portions of deferred income tax assets and (liabilities) as of December 31, 2019
and 2018, are as follows (in thousands):

Deferred income tax assets:

Net operating loss carryover

Stock compensation

Deferred compensation

Other

Total deferred income tax assets

Deferred income tax liabilities:

Property and equipment

Goodwill and other intangible assets

Other

Total deferred income tax liabilities

Net deferred income tax liabilities

2019

2018

$

$

$

$

$

1,519    $

580   

389    $

321   

2,809    $

(33,761)  

(291)  

—   

(34,052)  

(31,243)   $

2,730   

746   

243   

197   

3,916   

(35,030)  

(573)  

(219)  

(35,822)  

(31,906)  

The effective tax rate for the years ended December 31, 2019, 2018 and 2017, differs from the statutory rate as follows:

Statutory rate

State and local taxes

Uncertain tax position

Goodwill impairment

Research and development credit

Stock based compensation

Nondeductible compensation

Domestic production credit

Other

Effective rate 

Deferred re-measurement for rate change

Effective rate

2019

2018

2017

21.0  %

(3.7) %

—  %

(13.7) %

1.4  %

(0.8) %

(0.3) %

—  %

0.9  %

4.8  %

—  %

4.8  %

21.0  %

1.5  %

(139.1) %

—  %

92.2  %

10.0  %

(7.8) %

—  %

3.9  %

(18.3) %

—  %

(18.3) %

34.0  %

1.5  %

—  %

—  %

—  %

(14.3) %

—  %

(15.2) %

(1.5) %

4.5  %

(1218.0) %

(1213.5) %

During the fourth quarter of 2018, the Company discovered a potential uncertain tax position attributable to the deductibility of certain executive
compensation expense for federal income tax purposes aggregating approximately $168,000, $149,000 and $230,000 for the years ended December 31,
2017,  2016  and  2015,  respectively.  As  a  result,  in  accordance  with  ASC  Topic  740,  during  the  fourth  quarter  of  2018,  the  Company  recorded  a  tax
adjustment  of  $547,000  and  accrued  penalty  and  interest  expense  of  $55,000  attributable  to  the  uncertain  tax  position.  Management  of  the  Company
determined that effect of the potential uncertain tax position on previously reported results of operations for the years ended December 31, 2017, 2016 and
2015 was not material.

As  of  December  31,  2019,  the  Company  has  filed  amended  tax  returns  for  the  years  ended  2015,  2016  and  2017  and  has  recognized  certain

offsetting deductions, thus removing our uncertain tax position reserve for 2015, 2016 and 2017.

We account for uncertain tax positions in accordance with guidance in FASB ASC 740, which prescribes the minimum recognition threshold a tax

position taken or expected to be taken in a tax return is required to meet before being recognized in the financial statements.

F - 20

 
 
 
 
 
 
 
A reconciliation of the beginning and ending amount of uncertain tax positions is as follows (in thousands):

Balance at January 1, 2019

Additions based on tax positions related to current year

Reductions for tax positions of prior years

Balance at December 31, 2019

$

$

578   

—   

(578)  

—   

Our policy regarding income tax interest and penalties is to expense those items as incurred. During the years ended December 31, 2019, 2018

and 2017, there were no significant income tax interest or penalty items in the statement of income.

We  had  a  regular  income  tax  net  operating  loss  carry  forward  of  $6.7  million  for  federal  income  taxes  as  of  December  31,  2019.  This  net

operating loss will be carried forward indefinitely but subject to 80% limitation.

We file income tax returns in the U.S. federal jurisdiction and various state jurisdictions.  With few exceptions, we are no longer subject to U.S.

federal or state income tax examination by tax authorities for years before 2015.

10. Deferred Compensation Plans

Effective  January  1,  2016,  the  Company  established  a  non-qualified  deferred  compensation  plan  for  executive  officers,  directors  and  certain
eligible  employees.  The  assets  of  the  deferred  compensation  plan  are  held  in  a  rabbi  trust  and  are  subject  to  additional  risk  of  loss  in  the  event  of
bankruptcy or insolvency of the Company. The plan allows for deferral up to 90% of a participant’s base salary, bonus, commissions, director fees and
restricted stock awards. A Company owned life insurance policy held in a rabbi trust is utilized as a source of funding for the plan. The cash surrender
value of the life insurance policy is $1.5 million and $1.0 million as of December 31, 2019 and 2018, respectively, with a gain related to the policy of
$218,800  and  a  loss  of  $153,900  reported  in  other  income  in  our  consolidated  income  statement  for  the  year  ended  December  31,  2019  and  2018,
respectively.

For deferrals of base salary, bonus, commissions and director fees, settlement payments are made to participants in cash, either in a lump sum or in
periodic installments. The deferred obligation to pay the deferred compensation and the deferred director fees is adjusted to reflect the positive or negative
performance of investment measurement options selected by each participant and was $1.7 million and $1.1 million as of December 31, 2019 and 2018,
respectively. The deferred obligation is included in other long-term liabilities in the consolidated balance sheet.

For deferrals of restricted stock units, the plan does not allow for diversification, therefore, distributions are paid in shares of common stock and
the obligation is carried at grant value. As of December 31, 2019 and 2018, respectively, we have 85,565 and 101,895 unvested restricted stock units being
deferred. As of December 31, 2019 and 2018, respectively we have released and issued 89,187 and 34,732 shares to the deferred compensation plan with a
value of $1.7 million and $871,300, respectively.

11.  Stockholders' Equity

Preferred Stock

We  have  a  total  of  5.0  million  authorized  preferred  shares  with  rights  and  preferences  as  designated  by  the  Board  of  Directors.    As  of

December 31, 2019 and 2018, there were no issued or outstanding preferred shares.

12.  Rental Activity

We rent natural gas compressor packages to entities in the petroleum industry.  These rental arrangements are classified as operating leases and

generally have original terms of six months to sixty months and continue on a month-to-month basis thereafter. 

F - 21

 
Future minimum rent payments for arrangements not on a month-to-month basis at December 31, 2019 are as follows:

2020

2021

2022

2023

2024

Thereafter

Total

Years Ending December 31,

(in thousands)

$   

$   

$   

$   

$   

$   

$   

25,924 

18,489 

16,310 

12,507 

9,788 

2,366 

85,384 

13. Stock-Based Compensation

Restricted Stock/Units

 On June 18, 2014, at our annual meeting of shareholders, our shareholders approved a proposed amendment to the 2009 Restricted Stock/Unit
Plan (the "2009 Plan") to add additional 500,000 shares of common stock to the Plan, thereby authorizing the issuance of up to 800,000 shares of common
stock under the Plan. The 2009 Plan expired on June 16, 2019. At December 31, 2019 we had 123,092 shares outstanding under the 2009 Plan that will vest
over the next two years.

On  June  20,  2019,  at  our  annual  meeting  of  shareholders,  our  shareholders  approved  a  new  proposed  Equity  Incentive  Plan  for  restricted
shares/units and stock options. The Equity Incentive Plan allows issuance up to 500,000 share of common stock. As to December 31, 2019, only restricted
shares/units had been granted.

In  accordance  with  the  Company's  employment  agreement  with  Stephen  Taylor,  the  Company's  Chief  Executive  Officer,  the  Compensation
Committee reviewed his performance in determining the issuance of restricted common stock. Based on this review which included consideration of the
Company's  2018  performance,  Mr.  Taylor,  was  awarded  131,674  restricted  shares/units  on  March  29,  2019,  which  vest  over  three  years,  in  equal
installments  beginning  March  29,  2020.  On  March  29,  2019,  the  Compensation  Committee  awarded  20,000  restricted  shares/units  to  each  G.  Larry
Lawrence, our former CFO, and James Hazlett, our Vice President of Technical Services. The restricted shares/units to Messrs. Hazlett and G.L. Lawrence
vest over three years, in equal installments, beginning March 29, 2020. We also awarded and issued 23,136 shares of restricted common stock/units to our
Board  of  Directors  as  partial  payment  for  2019  directors'  fees.  The  restricted  stock/units  issued  to  our  directors  vests  over  one  year,  in  quarterly
installments, beginning March 31, 2020.

On November 15, 2019, our former CFO, G. Larry Lawrence, retired from the Company. At time of retirement, the Board of Directors approved
the  accelerated  vesting  of  all  unvested  shares  held  by  Mr.  Lawrence.  In  accordance  with  ASC  718,  the  Company  considered  the  Board’s  approval  of
accelerated vesting as a modification to all of the unvested shares held by Mr. Lawrence on the date of his retirement. The grant-date fair value of Mr.
Lawrence’s restricted shares/units ranged from $17.29 to $24.55 per share. The closing price of the Company's stock was $11.18 on November 15, 2019,
the modification date. Due to the price on date of modification being less than the original grant value, the Company recorded less compensation expense
related to the accelerated vesting than would have been recognized over the vesting period if Mr. Lawrence had not retired. Total compensation expensed
booked related to the Mr. Lawrence’s accelerated shares was $189,000.

Compensation  expense  related  to  the  restricted  shares/units  was  approximately  $2.5  million,  $2.2  million  and  $3.7  million  for  the  years  ended
December 31, 2019, 2018, and 2017, respectively. As of December 31, 2019, there was a total of approximately $3.3 million of unrecognized compensation
expense related to the nonvested portion of these restricted shares/units.  This expense is expected to be recognized over the next three years and a quarter.
As of December 31, 2019, 328,173 shares were still available for issuance under the Equity Incentive Plan.

F - 22

 
 
 
 
 
 
 
A summary of all restricted stock/units activity as of December 31, 2017, 2018 and 2019 and changes during the years then ended are presented below.

Outstanding, December 31, 2016

Granted

Vested

Canceled/Forfeited

Outstanding, December 31, 2017

Granted

Vested

Canceled/Forfeited

Outstanding, December 31, 2018

Granted

Vested

Canceled/Forfeited

Outstanding, December 31, 2019

Stock Option Plan

Number
 of
Shares

Weighted Average
Exercise Price

Weighted
Average
Remaining
Contractual Life
(years)

Aggregate
Intrinsic
Value
(in thousands)

139,451    $

126,432   

(81,494)  

—   

184,389    $

140,988   

(110,747)  

—   

214,630    $

199,810   

(134,674)  

—   

279,766    $

21.34   

27.06   

21.20   

—   

25.32   

24.55   

23.97   

—   

25.51   

17.16   

24.26   

—   

20.15   

9.13 $

—   

—   

—   

8.83 $

—   

—   

—   

8.85 $

—   

—   

—   

8.77 $

4,483   

3,421   

2,361   

—   

4,831   

3,461   

2,806   

—   

3,529   

3,433   

2,807   

—   

3,430   

Our Stock Option Plan which is stockholder approved, permits the granting of stock options to its employees for up to 1.0 million shares of
common stock under the Stock Option Plan. We believe that such awards align the interests of our employees with our stockholders. Option awards are
generally granted with an exercise price equal to the market price of our stock at the date of grant; those option awards generally vest based on three years
of continuous service and have ten-year contractual terms.  Certain option and share awards provide for accelerated vesting if there is a change in control of
the  Company  (as  defined  in  the  Stock  Option  Plan).    The  last  date  that  grants  can  be  made  under  the  Stock  Option  Plan  is  February  28,  2026.  As  of
December 31, 2019, 337,503 shares were still available for issue under the Stock Option Plan.

The fair value of each option award is estimated on the date of grant using the Black-Scholes option valuation model that uses the assumptions
noted in the following table.  The risk-free rate for periods within the contractual life of the option is based on the U.S. Treasury yield curve in effect at the
time of grant.  The expected life of options granted is based on the vesting period and historical exercise and post-vesting employment termination behavior
for similar grants.  We use historical data to estimate option exercise and employee termination within the valuation model; separate groups of employees
that have similar historical exercise behavior are considered separately for valuation purposes.

Weighted average Black -Scholes fair value assumption during the year ended December 31, are as follows:

Risk free rate

Expected life

Expected volatility

Expected dividend yield

There were no stock option grants made in 2019 or 2018.

2017

2.12  %

6 years

39.59  %

— 

F - 23

 
 
A summary of all option activity as of December 31, 2017, 2018 and 2019 and changes during the years then ended are presented below:

Outstanding, December 31, 2016

Granted

Exercised

Outstanding, December 31, 2017

Granted

Exercised

Canceled/Forfeited

Outstanding, December 31, 2018

Granted

Exercised

Canceled/Forfeited

Expired

Outstanding, December 31, 2019

Exercisable, December 31, 2019

Number
 of
Shares

Weighted Average
Grant Date Fair
Value

Weighted
Average
Remaining
Contractual Life
(years)

Aggregate
Intrinsic
Value
(in thousands)

350,186    $

32,750   

(55,666)  

327,270    $

—   

(38,250)  

(5,534)  

283,686    $

—   

(56,352)  

(8,000)  

(11,000)  

208,334    $

197,901    $

19.45   

28.15   

20.12   

20.21   

—   

17.19   

24.02   

20.46   

—   

8.97   

21.60   

17.74   

23.67   

23.43   

4.25 $

—   

—   

4.28 $

—   

—   

—   

3.58 $

—   

—   

—   

—   

3.66 $

3.48 $

4,453   

—   

446   

2,255   

—   

216   

—   

434   

—   

474   

—   

—   

—   

—   

The weighted average grant date fair value of options granted during 2017 was $11.93. We had no grants in 2019 and in 2018. The total intrinsic
value, or the difference between the exercise price and the market price on the date of exercise, of options exercised during the years ended December 31,
2019, 2018, and 2017 was approximately $474,000, $216,000, and $446,000, respectively. Cash received from stock options exercised during the years
ended December 31, 2019, 2018, and 2017 was approximately $506,000, $680,000, and $1.1 million, respectively.

The following table summarizes information about our stock options outstanding at December 31, 2019:

Range of Exercise Prices

$0.01-15.70

$15.71-17.81

$17.82-20.48

$20.49-33.36

Options Outstanding

Options Exercisable

Weighted
Average
Remaining
Contractual
Life (years)

Weighted
Average
Exercise
Price

2.07

0.74

1.34

5.34

3.66

$

$

14.89   

17.40   

19.43   

27.33   

23.67   

Shares

8,500   

26,000   

50,500   

123,334   

208,334   

Shares

8,500   

$

26,000   

50,500   

112,901   

197,901   

$

Weighted
Average
Exercise
Price

14.89   

17.40   

19.43   

27.26   

23.43   

F - 24

 
 
 
The summary of the status of our unvested stock options as of December 31, 2019 and changes during the year then ended is presented below.

Unvested stock options:
Unvested at December 31, 2018

Granted

Vested

Canceled/Forfeited

Unvested at December 31, 2019

Shares

Weighted Average
Grant Date Fair
Value

20,865    $

—   

(10,432)  

—   

10,433    $

11.93   

—   

11.93   

—   

11.93   

We recognized stock compensation expense from stock options vesting of $124,000, $159,000, and $363,000 for the years ended December 31,
2019, 2018 and 2017, respectively. As of December 31, 2019, there was approximately $16,000 of total unamortized compensation cost related to unvested
stock options.  We expect to recognize such cost in 2020.

14. (Loss) Earnings per Share

Basic  (loss)  earnings  per  common  share  is  computed  using  the  weighted  average  number  of  common  shares  outstanding  during  the
period.  Diluted (loss) earnings per common share is computed using the weighted average number of common stock and common stock equivalent shares
outstanding during the period.  

The following table sets forth the computation of basic and diluted (loss) earnings per share (in thousands, except per share amounts):

Numerator:

Net (loss) income

Denominator for basic net (loss) income per common share:

Weighted average common shares outstanding

Denominator for diluted net (loss) income per share:

Weighted average common shares outstanding

Dilutive effect of stock options and restricted shares

Diluted weighted average shares

(Loss) earnings per common share:

Basic

Diluted

Year Ended December 31,

2019

2018

2017

$

(13,864)   $

(466)   $

19,794   

13,114   

12,965   

12,831   

13,114   

12,965   

—   

—   

13,114   

12,965   

12,831   

279   

13,110   

$

$

(1.06)   $

(1.06)   $

(0.04)   $

(0.04)   $

1.54   

1.51   

In the years ended ended December 31, 2019 and 2018, restricted stock and stock options were not included in the computation of diluted loss per

share due to their antidilutive effect.

In the year-ended December 31, 2017, options to purchase 83,917 shares of common stock with exercise prices ranging from $28.15 to $33.36

were not included in the computation of dilutive income per share, due to their anti-dilutive effect.

15. Related Party

In 2016, we entered into a joint venture partnership, N-G, LLC (‘N-G”), with Genis Holdings, LLC (“Genis”) to explore new technologies for
wellhead compression. NGS and Genis both share 50% ownership of N-G. We account for this investment under the equity method. In 2018, we ordered
some compressor packages from Genis, totaling $1.0 million. The compressors were completed and paid in full at December 31, 2019.

F - 25

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
16. Commitments and Contingencies

401(k) Plan

We offer a 401(k) Plan to all employees that have reached the age of eighteen and have completed two months of service. The participants may
contribute  up  to  100%  of  their  salary  subject  to  IRS  limitations.  Employer  contributions  are  subject  to  Board  discretion  and  are  subject  to  a  vesting
schedule of 20% each year after the first year and 100% after six years.  We contributed $393,000, $355,000, and $301,000 to the 401(k) Plan in 2019,
2018 and 2017, respectively, which is recorded in cost of revenues and selling, general and administrative expenses..

Legal Proceedings

From time to time, we are a party to various legal proceedings in the ordinary course of our business.  While management is unable to predict the
ultimate outcome of these actions, it believes that any ultimate liability arising from these actions will not have a material effect on our financial position,
results of operations or cash flow.  We are not currently a party to any bankruptcy, receivership, reorganization, adjustment or similar proceeding, and we
are not aware of any other threatened litigation.

17.  Quarterly Financial Data (Unaudited)

The following tables presents selected unaudited financial data for each of the eight quarters in the two-year period ended December 31, 2019,
which  have  been  updated  to  reflect  the  revisions  discussed  in  Note  2  (Summary  of  Significant  Accounting  Policies).  The  revisions  to  the  Company's
unaudited interim financial statements during 2019 will be incorporated when it issues its Forms 10-Q for the first three quarter of 2020.

The Company believes this information reflects all recurring adjustments necessary to fairly state this information when read in conjunction with

the Company's financial statements and the related notes. Please note that amounts in the tables below may not sum due to rounding differences.

(in thousands, except per share)

Total revenue

Operating income (loss)

Net income (loss)

Earnings (loss) per share, basic

Earnings (loss) per share, diluted

Earnings (loss) per share, year to date, basic

Earnings (loss) per share, year to date, diluted

2019

Q1

Q2

Q3

Q4

Total

$

17,991    $

19,895    $

20,852    $

19,706    $

78,444   

(145)  

98   

0.01   

0.01   

0.01   

0.01   

302   

327   

0.02   

0.02   

0.03   

0.03   

(14,021)  

(12,579)  

(0.96)  

(0.96)  

(0.93)  

(0.93)  

(1,289)  

(1,710)  

(0.13)  

(0.13)  

(1.06)  

(1.06)  

(15,153)  

(13,864)  

(1.06)  

(1.06)  

(1.06)  

(1.06)  

2018

Q1

Q2

Q3

Q4

Total

Total revenue

Operating income (loss)

Net income (loss)

Earnings (loss) per share, basic

Earnings (loss) per share, diluted

$

14,718    $

18,204    $

16,396    $

16,160    $

65,478   

305   

190   

0.01   

0.01   

179   

211   

0.02   

0.02   

(500)  

(118)  

(0.01)  

(0.01)  

(491)  

(749)  

(0.06)  

(0.06)  

(507)  

(466)  

(0.04)  

(0.04)  

F - 26

Revisions to our unaudited quarterly financial data are as follows:

($ in thousands, except per share)

Total revenue

Operating loss

Net loss

Loss per share, basic

Loss per share, diluted

($ in thousands, except per share)

Total revenue

Operating income (loss)

Net income (loss)

Earnings (loss) per share, basic

Earnings (loss) per share, diluted

($ in thousands, except per share)

Total revenue

Operating income (loss)

Net income (loss)

Earnings (loss) per share, basic

Earnings (loss) per share, diluted

($ in thousands, except per share)

Total revenue

Operating loss

Net loss

Loss per share, basic

Loss per share, diluted

($ in thousands, except per share)

Total revenue

Operating (loss)

Net income (loss)

Earnings (loss) per share, basic

Earnings (loss) per share, diluted

For the Three Months Ended September 30, 2019

As Reported

Revisions

As Revised

$

20,852    $

—    $

(13,561)  

(12,232)  

(0.93)  

(0.93)  

(460)  

(347)  

(0.03)  

(0.03)  

20,852   

(14,021)  

(12,579)  

(0.96)  

(0.96)  

For the Three Months Ended June 30, 2019

As Reported

Revisions

As Revised

$

19,895    $

—    $

19,895   

593   

573   

0.04   

0.04   

(291)  

(246)  

(0.02)  

(0.02)  

302   

327   

0.02   

0.02   

For the Three Months Ended March 31, 2019

As Reported

Revisions

As Revised

$

17,991   

$

—   

$

17,991   

209   

357   

0.03   

0.03   

(354)  

(259)  

(0.02)  

(0.02)  

(145)  

98   

0.01   

0.01   

For the Three Months Ended December 31, 2018

As Reported

Revisions

As Revised

$

16,160   

$

—   

$

16,160   

106   

(282)  

(0.02)  

(0.02)  

(597)  

(467)  

(0.04)  

(0.04)  

(491)  

(749)  

(0.06)  

(0.06)  

For the Three Months Ended September 30, 2018

As Reported

Revisions

As Revised

$

16,396    $

—    $

16,396   

(44)  

236   

0.02   

0.02   

(456)  

(354)  

(0.03)  

(0.03)  

(500)  

(118)  

(0.01)  

(0.01)  

F - 27

($ in thousands, except per share)

Total revenue

Operating income (loss)

Net income (loss)

Earnings (loss) per share, basic

Earnings (loss) per share, diluted

($ in thousands, except per share)

Total revenue

Operating income (loss)

Net income (loss)

Earnings (loss) per share, basic

Earnings (loss) per share, diluted

For the Three Months Ended June 30, 2018

As Reported

Revisions

As Revised

$

18,204    $

—    $

18,204   

226   

247   

0.02   

0.02   

(47)  

(36)  

—   

—   

179   

211   

0.02   

0.02   

For the Three Months Ended March 31, 2018

As Reported

Revisions

As Revised

$

14,718    $

—    $

14,718   

350   

225   

0.02   

0.02   

(45)  

(35)  

(0.01)  

(0.01)  

305   

190   

0.01   

0.01   

18.  Revisions of Prior Period Financial Statements

As discussed in Note 2 (Summary of Significant Accounting Policies), in conjunction with the preparation of its year-end financial statements for
2019, the Company determined that certain, immaterial operating costs and expenses were inappropriately capitalized during the years ended December 31,
2018  and  2017,  as  well  for  interim  periods  in  2019  and  2018.  As  a  result,  the  Company  revised  its  prior  period  financial  statements  to  incorporate
additional  operating  costs  and  expenses  of  $1.1  million,  $1.14  million  and  $96,000  for  the  nine  months  ended  September  30,  2019,  the  year  ended
December 31, 2018 and the year ended December 31, 2017, respectively.

These revisions are summarized in the tables below.

Revised Consolidated Balance Sheet

($ in thousands)

Assets

Inventory

Prepaid income taxes

Prepaid expenses and other

  Total current assets

Rental equipment, net of accumulated depreciation

Property and equipment, net of accumulated depreciation

  Total assets

Liabilities and Stockholders' Equity

Deferred income tax liability

  Total liabilities

Retained earnings

  Total stockholders' equity

  Total liabilities and stockholders' equity

As of December 31, 2018

As Reported

Revisions

As Revised

$

30,974    $

(784)   $

3,148   

2,430   

96,399   

175,886   

16,587   

305,401   

40   

(734)  

(1,478)  

220   

57   

(1,201)  

$

32,158    $

(252)   $

45,220   

152,291   

260,181   

305,401   

(252)  

(949)  

(949)  

(1,201)  

30,190   

3,188   

1,696   

94,921   

176,106   

16,644   

304,200   

31,906   

44,968   

151,342   

259,232   

304,200   

F - 28

Revised Consolidated Statements of Income

($ in thousands, except per share)

Total revenue

Operating costs and expenses:

Cost of rentals, exclusive of depreciation stated separately below

Depreciation and amortization

  Total operating costs and expenses

  Operating income (loss)

Income (loss) before provision for income taxes

Provision for income taxes:

Current benefit (expense)

Deferred (expense) benefit

Income tax (expense) benefit

  Net income (loss)

  Earnings (loss) per share, basic

  Earnings (loss) per share, diluted

($ in thousands, except per share)

Total revenue

Operating costs and expenses:

Cost of rentals, exclusive of depreciation stated separately below

Depreciation and amortization

Total operating costs and expenses

Operating income (loss)

Income (loss) before provision for income taxes

Provision for income taxes:

Current (expense) benefit

Deferred benefit (expense)

Income tax benefit

Net income (loss)

Earnings (loss) per share, basic

Earnings (loss) per share, diluted

Revised Consolidated Statements of Stockholders' Equity

($ in thousands)

Net income (loss)

Retained earnings

Total stockholders' equity

For the Year Ended December 31, 2018

As Reported

Revisions

As Revised

$

65,478    $

—    $

65,478   

20,746   

22,049   

64,840   

638   

751   

248   

(573)  

(325)  

426   

0.03   

0.03   

1,114   

31   

1,145   

(1,145)  

(1,145)  

(6)  

259   

253   

(892)  

(0.07)  

(0.07)  

21,860   

22,080   

65,985   

(507)  

(394)  

242   

(314)  

(72)  

(466)  

(0.04)  

(0.04)  

For the Year Ended December 31, 2017

As Reported

Revisions

As Revised

$

67,693    $

—    $

67,693   

18,078   

21,302   

66,126   

1,567   

1,603   

(3,334)  

21,582   

18,248   

19,851   

1.55   

1.51   

82   

14   

96   

(96)  

(96)  

46   

(7)  

39   

(57)  

(0.01)  

—   

18,160   

21,316   

66,222   

1,471   

1,507   

(3,288)  

21,575   

18,287   

19,794   

1.54   

1.51   

For the Year Ended December 31, 2018

As Reported

Revisions

As Revised

$

426    $

(892)   $

152,291   

260,181   

(949)  

(949)  

(466)  

151,342   

259,232   

F - 29

($ in thousands)

Net income (loss)

Retained earnings

Total stockholders' equity

Revised Consolidated Statements of Cash Flows

($ in thousands)

Cash flows from operating activities:

Net income (loss)

Depreciation and amortization

Deferred taxes

Inventory (increase) decrease

Prepaid income taxes and prepaid expenses (increase) decrease

    Net cash provided by operating activities

Cash flows from investing activities:

Purchase of rental equipment, property and other equipment

    Net cash used in investing activities

    Net change in cash and cash equivalents

($ in thousands)

Cash flows from operating activities:

Net income (loss)

Depreciation and amortization

Deferred taxes

Inventory (increase) decrease

Prepaid income taxes and prepaid expenses increase

    Net cash provided by operating activities

Cash flows from investing activities:

Purchase of rental equipment, property and other equipment

    Net cash used in investing activities

    Net change in cash and cash equivalents

For the Year Ended December 31, 2017

As Reported

Revisions

As Revised

$

19,851    $

151,865   

257,319   

(57)   $

(57)  

(57)  

19,794   

151,808   

257,262   

For the Year Ended December 31, 2018

As Reported

Revisions

As Revised

$

426   

$

(892)  

$

22,049   

573   

(5,757)  

(1,318)  

23,414   

(39,790)  

(40,010)  

(16,580)  

31   

(259)  

655   

740   

275   

(275)  

(275)  

—   

(466)  

22,080   

314   

(5,102)  

(578)  

23,689   

(40,065)  

(40,285)  

(16,580)  

For the Year Ended December 31, 2017

As Reported

Revisions

As Revised

$

19,851    $

(57)   $

21,302   

(21,582)  

(5,350)  

(1,806)  

17,452   

(13,489)  

(12,791)  

5,114   

14   

7   

129   

(46)  

47   

(47)  

(47)  

—   

19,794   

21,316   

(21,575)  

(5,221)  

(1,852)  

17,499   

(13,536)  

(12,838)  

5,114   

F - 30

19.  Subsequent Events

On  January  30,  2020,  the  World  Health  Organization  (“WHO”)  announced  a  global  health  emergency  because  of  a  new  strain  of  coronavirus
known  as  COVID-19  due  to  the  risks  it  imposes  on  the  international  community  as  the  virus  spreads  globally.  In  March  2020,  the  WHO  classified  the
COVID-19 outbreak as a pandemic, based on the rapid increase in exposure globally. During this time, the market began to experience a decline in oil
prices  in  response  to  oil  demand  concerns  due  to  the  global  economic  impacts  of  COVID-19.  In  addition,  recent  events  concerning  OPEC  and  Russia
resulted in Saudi Arabia significantly discounting the price of its crude oil, as well as Saudi Arabia and Russia significantly increasing their oil supply.
These actions have led to significant weakness in oil prices and ensuing reductions of exploration and production company capital and operating budgets.

The full impact of the COVID-19 outbreak continues to evolve daily as of the date of this report. With the significant decline in oil prices as well
as  the  general  economic  decline  caused  by  the  impacts  of  COVID-19,  we  expect  utilization  to  decline  among  our  smaller  horsepower  and  medium
horsepower units during the remainder of 2020 after a minimal decline during the first quarter of 2020. In terms of sales, we expect minimal compressor
sales for the year due to much lower capital expenditure budgets throughout the industry, including those of our major customers. Finally, we have recently
experienced and expect to continue to experience pricing pressure from our customers and competitors until industry and economic conditions improve. We
are  currently  experiencing  no  issues  with  potential  workforce  and  supply  chain  disruptions.  Our  relationship  with  our  major  customer  continues  to  be
strong, and they have continued to pay our invoices in a timely, consistent manner. Nevertheless, if any of these circumstances change, our business could
be adversely affected.

While  management  anticipates  that  the  industry  and  economic  impact  of  the  pandemic  and  OPEC’s  actions  will  have  a  negative  effect  on  its

results of operations in 2020 and perhaps beyond, the degree to which these factors will impact our business remains uncertain.

F - 31

Exhibit 21.1

Subsidiaries of the Registrant

Listed below are subsidiaries of Natural Gas Services Group, Inc. with their jurisdiction of organization shown in parenthesis:

NGSG Properties, LLC (Colorado)
Rabbi Trust associated with the Company's Non-qualified Deferred Compensation Plan (Texas)

                                                                          
Consent of Independent Registered Public Accounting Firm

Exhibit 23.1

Natural Gas Services Group, Inc.
Midland, Texas

We  hereby  consent  to  the  incorporation  by  reference  in  the  Registration  Statements  on  Form  S-8  (Nos.  333-212411,  333-196578,  333-
160068, 333-160063, 333-147311, and 333-110954) of Natural Gas Services Group, Inc. of our reports dated March 31, 2020, relating to the
consolidated financial statements and the effectiveness of Natural Gas Services Group, Inc.’s internal control over financial reporting, which
appear in this Annual Report on Form 10-K. Our report on the effectiveness of internal control over financial reporting expresses an adverse
opinion on the effectiveness of the Company’s internal control over financial reporting as of December 31, 2019.

/s/ BDO USA, LLP

Austin, Texas
March 31, 2020

Exhibit 31.1

I, Stephen C. Taylor, certify that:

1.

I have reviewed this Annual Report on Form 10-K of Natural Gas Services Group, Inc;

Certifications

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the
statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this
report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the

financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in
Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-
15(f) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to
ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those
entities, particularly during the period in which this report is being prepared;

b. Designed  such  internal  control  over  financial  reporting,  or  caused  such  internal  control  over  financial  reporting  to  be  designed  under  our
supervision,  to  provide  reasonable  assurance  regarding  the  reliability  of  financial  reporting  and  the  preparation  of  financial  statements  for
external purposes in accordance with generally accepted accounting principles;

c. Evaluated  the  effectiveness  of  the  registrant's  disclosure  controls  and  procedures  and  presented  in  this  report  our  conclusions  about  the

effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent
fiscal  quarter  (the  registrant's  fourth  fiscal  quarter  in  the  case  of  an  annual  report)  that  has  materially  affected,  or  is  reasonably  likely  to
materially affect, the registrant's internal control over financial reporting; and

1. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to

the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a. All  significant  deficiencies  and  material  weaknesses  in  the  design  or  operation  of  internal  control  over  financial  reporting  which  are

reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any  fraud,  whether  or  not  material,  that  involves  management  or  other  employees  who  have  a  significant  role  in  the  registrant's  internal

control over financial reporting.

Dated: March 31, 2020

Natural Gas Services Group, Inc.

By: /s/ Stephen C. Taylor

Stephen C. Taylor,

President, CEO and Chairman of the Board of Directors

(Principal Executive Officer)

 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 31.2

I, James R. Lawrence, certify that:

1. I have reviewed this Annual Report on Form 10-K of Natural Gas Services Group, Inc;

Certifications

2.  Based  on  my  knowledge,  this  report  does  not  contain  any  untrue  statement  of  a  material  fact  or  omit  to  state  a  material  fact  necessary  to  make  the
statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.  Based  on  my  knowledge,  the  financial  statements,  and  other  financial  information  included  in  this  report,  fairly  present  in  all  material  respects  the
financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.  The  registrant's  other  certifying  officer(s)  and  I  are  responsible  for  establishing  and  maintaining  disclosure  controls  and  procedures  (as  defined  in
Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f) for
the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to
ensure  that  material  information  relating  to  the  registrant,  including  its  consolidated  subsidiaries,  is  made  known  to  us  by  others  within  those  entities,
particularly during the period in which this report is being prepared;

(b)  Designed  such  internal  control  over  financial  reporting,  or  caused  such  internal  control  over  financial  reporting  to  be  designed  under  our
supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes
in accordance with generally accepted accounting principles;

(c)  Evaluated  the  effectiveness  of  the  registrant's  disclosure  controls  and  procedures  and  presented  in  this  report  our  conclusions  about  the

effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent
fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect,
the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the
registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably

likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control

over financial reporting.

Dated: March 31, 2020

Natural Gas Services Group, Inc.

By: /s/ James R. Lawrence

 James R. Lawrence

Vice President and Chief Financial Officer

(Principal Accounting Officer)

 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. §1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Natural Gas Services Group, Inc. (the “Company”) on Form 10-K for the period ended December 31, 2019 as
filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Stephen C. Taylor, Chief Executive Officer of the Company,
certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: March 31, 2020

Natural Gas Services Group, Inc.

By: /s/ Stephen C. Taylor

Stephen C. Taylor,

President, CEO and Chairman of the Board of Directors

(Principal Executive Officer)

The foregoing certification is being furnished solely to accompany the Report pursuant to 18 U.S.C. § 1350, and is not being filed for purposes of Section
18 of the Securities Exchange Act of 1934, as amended, and is not to be incorporated by reference into any filing of the Company, whether made before or
after the date hereof, regardless of any general incorporation language in such filing.

 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. §1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Natural Gas Services Group, Inc. (the “Company”) on Form 10-K for the period ended December 31, 2019 as
filed  with  the  Securities  and  Exchange  Commission  on  the  date  hereof  (the  “Report”),  I,  James  R.  Lawrence,  Chief  Financial  Officer  of  the  Company,
certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: March 31, 2020

Natural Gas Services Group, Inc.

By: /s/ James R. Lawrence

James R. Lawrence

Vice President and Chief Financial Officer

(Principal Accounting Officer)

The foregoing certification is being furnished solely to accompany the Report pursuant to 18 U.S.C. § 1350, and is not being filed for purposes of Section
18 of the Securities Exchange Act of 1934, as amended, and is not to be incorporated by reference into any filing of the Company, whether made before or
after the date hereof, regardless of any general incorporation language in such filing.