Form 10-Q - Quarterly report [Sections 13 or 15(d)]

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2024

☐ 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						75-2811855
(State or other jurisdiction of incorporation or organization)						(I.R.S. Employer Identification No.)

404 Veterans Airpark Ln., Ste 300

Midland, Texas 79705

(Address of principal executive offices)

(432) 262-2700

(Registrant’s telephone number, including area code)


Securities registered pursuant to Section 12(b) of the Act:
Title of each class	Trading Symbol	Name of each exchange on which registered
Common Stock, Par Value $0.01	NGS	New York Stock Exchange

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 x						No o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 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 x						No o

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 the definitions of “large accelerated filer”, “accelerated filer”, and “smaller reporting company” and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer o

Accelerated filer o

Non-accelerated filer ☒

Smaller reporting company ☒

Emerging growth company ☐

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.o

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


Yes ☐						No x

As of August 5, 2024 there were 12,466,875 shares of the Registrant's common stock, $0.01 par value, outstanding.


Part I - FINANCIAL INFORMATION

Item 1. Consolidated Financial Statements

Unaudited Condensed Consolidated Balance Sheets	Page	1

Unaudited Condensed Consolidated Statements of Operations	Page	2

Unaudited Condensed Consolidated Statements of Stockholders' Equity	Page	3

Unaudited Condensed Consolidated Statements of Cash Flows	Page	5

Notes to Unaudited Condensed Consolidated Financial Statements	Page	6

Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations	Page	16

Item 3. Quantitative and Qualitative Disclosures about Market Risk	Page	23

Item 4. Controls and Procedures	Page	23

Part II - OTHER INFORMATION

Item 1. Legal Proceedings	Page	24

Item 1A. Risk Factors	Page	24

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	Page	25

Item 3. Defaults Upon Senior Securities	Page	25

Item 4. Mine Safety Disclosures	Page	25

Item 5. Other Information	Page	25

Item 6. Exhibits	Page	26

Signatures	Page	28

PART I – FINANCIAL INFORMATION

Item 1. Financial Statements


NATURAL GAS SERVICES GROUP, INC. CONDENSED CONSOLIDATED BALANCE SHEETS (in thousands, except par value) (unaudited)
	June 30,		December 31,
	2024		2023
ASSETS
Current Assets:
Cash and cash equivalents	$	3,616	$	2,746
Trade accounts receivable, net of allowance for doubtful accounts of $1,110 and $823, respectively	33,001		39,186
Inventory, net of allowance for obsolescence of $2,836	20,254		21,639
Federal income tax receivable	11,386		11,538

Prepaid expenses and other	2,139		1,162
Total current assets	70,396		76,271
Long-term inventory, net of allowance for obsolescence of $1,168	937		701
Rental equipment, net of accumulated depreciation of $204,632 and $191,745, respectively	388,331		373,649
Property and equipment, net of accumulated depreciation of $18,273 and $17,649, respectively	19,584		20,550


Intangibles, net of accumulated amortization of $2,447 and $2,384, respectively	712		775
Other assets	9,205		6,783
Total assets	$	489,165	$	478,729
LIABILITIES AND STOCKHOLDERS' EQUITY
Current Liabilities:
Accounts payable	$	23,336	$	17,628
Accrued liabilities	6,803		15,085




Total current liabilities	30,139		32,713
Long-term debt	163,000		164,000
Deferred income tax liability	44,290		41,636


Other long-term liabilities	6,076		4,486
Total liabilities	243,505		242,835
Commitments and contingencies (Note 9)
Stockholders’ Equity:
Preferred stock, 5,000 shares authorized, no shares issued or outstanding	—		—
Common stock, 30,000 shares authorized, par value $0.01; 13,727 and 13,688 shares issued, respectively	137		137
Additional paid-in capital	116,898		116,480
Retained earnings	143,629		134,281


Treasury shares, at cost, 1,310 shares	(15,004)		(15,004)
Total stockholders' equity	245,660		235,894
Total liabilities and stockholders' equity	$	489,165	$	478,729

See accompanying notes to these unaudited condensed consolidated financial statements.


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

	Three months ended				Six months ended
	June 30,				June 30,
	2024		2023		2024		2023
Revenue:
Rental income	$	34,926	$	24,105	$	68,660	$	46,828
Sales	2,270		1,595		4,773		4,587
Aftermarket services	1,295		1,257		1,965		2,162
Total revenue	38,491		26,957		75,398		53,577
Operating costs and expenses:
Cost of rentals, exclusive of depreciation stated separately below	14,228		11,343		27,342		22,988
Cost of sales, exclusive of depreciation stated separately below	2,249		1,876		4,429		5,113
Cost of aftermarket services, exclusive of depreciation stated separately below	1,012		969		1,512		1,578
Selling, general and administrative expenses	4,791		4,860		9,493		9,422
Depreciation and amortization	7,705		6,418		14,792		12,583
Impairment expense	—		779		—		779

Retirement of rental equipment	—		—		5		—
Total operating costs and expenses	29,985		26,245		57,573		52,463
Operating income	8,506		712		17,825		1,114
Other income (expense):
Interest expense	(2,932)		(185)		(5,867)		(185)
Other income (expense), net	(30)		226		163		341
Total other income (expense), net	(2,962)		41		(5,704)		156
Income before provision for income taxes	5,544		753		12,121		1,270
Income tax expense	(1,294)		(249)		(2,773)		(396)
Net income	$	4,250	$	504	$	9,348	$	874
Earnings per share:
Basic	$	0.34	$	0.04	$	0.75	$	0.07
Diluted	$	0.34	$	0.04	$	0.75	$	0.07
Weighted average shares outstanding:
Basic	12,384		12,292		12,392		12,253
Diluted	12,483		12,394		12,484		12,374

See accompanying notes to these unaudited condensed consolidated financial statements.


	NATURAL GAS SERVICES GROUP, INC. CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (in thousands) (unaudited)
	Preferred Stock			Common Stock			Additional Paid-In Capital		Retained Earnings		Treasury Stock			Total Stockholders' Equity
	Shares	Amount		Shares	Amount						Shares	Amount
BALANCES, January 1, 2023	—	$	—	13,519	$	135	$	115,411	$	129,534	1,310	$	(15,004)	$	230,076
Compensation expense on common stock options	—	—		—	—		22		—		—	—		22
Issuance of restricted stock	—	—		29	—		—		—		—	—		—
Compensation expense on restricted common stock	—	—		—	—		465		—		—	—		465
Taxes paid related to net shares settlement of equity awards	—	—		—	—		(184)		—		—	—		(184)

Net income	—	—		—	—		—		370		—	—		370
BALANCES, March 31, 2023	—	$	—	13,548	$	135	115,714		$	129,904	1,310	$	(15,004)	$	230,749
Issuance of restricted stock	—	—		140	1		(1)		—		—	—		—
Compensation expense on common stock options	—	—		—	—		30		—		—	—		30
Compensation expense on restricted common stock	—	—		—	—		1,100		—		—	—		1,100
Taxes paid related to net shares settlement of equity awards	—	—		—	—		(798)		—		—	—		(798)

Net loss	—	—		—	—		—		504		—	—		504
BALANCES, June 30, 2023	—	$	—	13,688	$	136	$	116,045	$	130,408	1,310	$	(15,004)	$	231,585

See accompanying notes to these unaudited condensed consolidated financial statements.


NATURAL GAS SERVICES GROUP, INC. CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (in thousands) (unaudited)
	Preferred Stock			Common Stock			Additional Paid-In Capital		Retained Earnings		Treasury Stock			Total Stockholders' Equity
	Shares	Amount		Shares	Amount						Shares	Amount
BALANCES, January 1, 2024	—	$	—	13,688	$	137	$	116,480	$	134,281	1,310	$	(15,004)	$	235,894

Compensation expense on common stock options	—	—		—	—		29		—		—	—		29

Compensation expense on restricted common stock	—	—		—	—		245		—		—	—		245
Taxes paid related to net shares settlement of equity awards	—	—		6	—		—		—		—	—		—

Net income	—	—		—	—		—		5,098		—	—		5,098
BALANCES, March 31, 2024	—	—		13,694	137		116,754		139,379		1,310	$	(15,004)	241,266
Compensation expense on common stock options	—	—		—	—		46		—		—	—		46

Compensation expense on restricted common stock	—	—		—	—		196		—		—	—		196
Taxes paid related to net shares settlement of equity awards	—	—		33	—		(98)		—		—	—		(98)

Net income	—	—		—	—		—		4,250		—	—		4,250
BALANCES, June 30, 2024	—	$	—	13,727	$	137	$	116,898	$	143,629	1,310	$	(15,004)	$	245,660

See accompanying notes to these unaudited condensed consolidated financial statements.


NATURAL GAS SERVICES GROUP, INC. CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (in thousands) (unaudited)
	Six months ended
	June 30,
	2024		2023
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$	9,348	$	874
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	14,792		12,583
Amortization of debt issuance costs	315		184
Deferred income tax expense	2,654		396
Stock-based compensation	516		1,617
Provision from credit losses	287		128

Impairment expense	—		779
Gain on sale of assets	(229)		(206)
Retirement of rental equipment	5		—
Gain on company owned life insurance	(173)		(80)
Changes in operating assets and liabilities:
Trade accounts receivables	5,898		(6,332)
Inventory	1,149		(4,438)

Prepaid expenses and prepaid income taxes	(825)		(301)
Accounts payable and accrued liabilities	(2,575)		16,888

Deferred income	(418)		(37)

Other	375		588

NET CASH PROVIDED BY OPERATING ACTIVITIES	31,119		22,643
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of rental equipment, property and other equipment	(28,262)		(93,479)
Purchase of company owned life insurance	(17)		(329)
Proceeds from sale of property and equipment	355		231
Proceeds from surrender of company owned life insurance	43		—

NET CASH USED IN INVESTING ACTIVITIES	(27,881)		(93,577)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from loan	8,000		75,011
Repayment of loan	(9,000)		—
Payments of other long-term liabilities, net	(385)		(50)
Payments of debt issuance costs	(885)		(2,131)


Taxes paid related to net share settlement of equity awards	(98)		(982)

NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES	(2,368)		71,848
NET CHANGE IN CASH AND CASH EQUIVALENTS	870		914
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	2,746		3,372
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$	3,616	$	4,286
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Interest paid	$	10,458	$	1,966

NON-CASH TRANSACTIONS
Transfer of rental equipment to inventory	$	—	$	708
Right of use asset acquired through a finance lease	$	1,751	$	63

See accompanying notes to these unaudited condensed consolidated financial statements.

Natural Gas Services Group, Inc.

Notes to Condensed Consolidated Financial Statements

(unaudited)

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. We design, rent, sell, service and maintain natural gas compressors for oil and natural gas production and plant facilities, generally using equipment from third-party fabricators and OEM suppliers along with limited in-house assembly. NGS is headquartered in Midland, Texas, with a fabrication facility located in Tulsa, Oklahoma, a rebuild shop in 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 and Basis of Presentation

The accompanying unaudited condensed consolidated financial statements include the accounts of the Company, its subsidiary, NGSG Properties, LLC, which owns the Company's headquarters office building and the rabbi trust associated with the Company's deferred compensation plan. All significant intercompany accounts and transactions for the periods presented have been eliminated in consolidation.

These financial statements include all adjustments, consisting of only normal recurring adjustments, which are necessary to make our financial position at June 30, 2024 and the results of our operations for the three months and six ended June 30, 2024 and 2023 not misleading. Some adjustments may cause the prior year number in these financial statements to differ from the prior year interim financial statements. As permitted by the rules and regulations of the Securities and Exchange Commission (the "SEC"), the accompanying condensed consolidated financial statements do not include all disclosures normally required by generally accepted accounting principles in the United States of America (GAAP). These financial statements should be read in conjunction with the consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2023 on file with the SEC. In our opinion, the condensed consolidated financial statements are a fair presentation of the financial position, results of operations, changes in stockholders' equity and cash flows for the periods presented.

The results of operations for the three and six months ended June 30, 2024 are not necessarily indicative of the results of operations to be expected for the full fiscal year ending December 31, 2024.

Revenue Recognition Policy

Revenue is measured based on the consideration and terms 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 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 during the rental contract. Our rental contracts typically range from six to 60 months. Our revenue is recognized over time, with 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 with 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 and parts, as well as exchange/rebuilding customer owned compressors and sale of used rental equipment. Our sales revenue is recognized in accordance with ASC 606.

Custom compressors - The Company designs and assembles compressors 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 is completed and shipped, or in accordance with a bill and hold arrangement, in which the customer accepts title and assumes the risk and rewards of ownership at a specified time. We request some of our customers to make progressive payments as the compressor is being built; these payments are recorded as a contract liability on the Accrued Liability 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.

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 rebuild 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 or rebuilt 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 - From time to time, a customer may request to purchase a used compressor 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.

Aftermarket Service Revenue. The Company provides routine or call-out services on customer owned equipment as well as commissioning of new units for customers. Revenue is recognized after services in the contract are rendered.

Payment terms for sales revenue and aftermarket services 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 three months and six months ended June 30, 2024 and 2023:


	Three months ended June 30,				Six months ended June 30,
	2024		2023		2024		2023
	(in thousands)				(in thousands)
Compressors - sales	$	58	$	38	$	1,341	$	1,007

Other (parts/rebuilds) - sales	2,212		1,557		3,432		3,580
Aftermarket services	1,295		1,257		1,965		2,162
Total revenue from contracts with customers	3,565		2,852		6,738		6,749
Add: ASC 842 rental revenue	34,926		24,105		68,660		46,828
Total revenue	$	38,491	$	26,957	$	75,398	$	53,577

Contract Balances

As of June 30, 2024 and December 31, 2023, we had the following receivables and deferred income from contracts with customers:


	June 30, 2024		December 31, 2023
	(in thousands)
Accounts Receivable
Accounts receivable - contracts with customers	$	5,593	$	7,138
Accounts receivable - ASC 842	28,518		32,871
Total Accounts Receivable	34,111		40,009
Less: Allowance for doubtful accounts	(1,110)		(823)
Total Accounts Receivable, net	$	33,001	$	39,186

Deferred income	$	—	$	418

The Company recognized sales revenues of $0.4 million for the six months ended June 30, 2024 that was included in accrued liabilities at the beginning of 2024.

The decrease in accounts receivable and deferred income were primarily due to normal timing differences between our performance and the customers’ payments.

Remaining Performance Obligations

As of June 30, 2024, the Company had no deferred 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 expenses on our condensed consolidated statements of operations.

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 carryforwards. 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. Valuation allowances are established to reduce deferred tax assets when it is more likely than not that some portion or all of the deferred tax assets will not be realized. To the extent we establish a valuation allowance or increase this allowance in a period, we include an expense in the tax provision in our condensed consolidated statements of operations.

We account for uncertain tax positions in accordance with guidance in 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 condensed consolidated financial statements. Tax benefits are recognized only for tax positions that are more likely than not to be sustained upon examination by tax authorities. The amount recognized is measured as the largest amount of benefit that is greater than 50% likely to be realized upon settlement. A liability for unrecognized tax benefits is recorded for any tax benefits claimed in our tax returns that do not meet these recognition and measurement standards. We have no liabilities for uncertain tax positions as of June 30, 2024.

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

Capitalized Interest

The Company capitalizes interest from external borrowings on significant expenditures for the fabrication of its natural gas compressor equipment until such projects are ready for their intended use. Capitalized interest is added to the cost of the underlying asset and is amortized over the useful lives of the assets in the same manner as the underlying assets. For the three months ended June 30, 2024 and 2023, the Company capitalized interested aggregating approximately $1.2 million and $1.8 million. For the six months ended June 30, 2024 and 2023, the Company capitalized interest aggregating approximately $2.4 million and $2.7 million, respectively.

Recently Issued Accounting Pronouncements

In December 2023, the Financial Standards Accounting Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-09 “Income Taxes (Topics 740): Improvements to Income Tax Disclosures” to expand the disclosure requirements for income taxes, specifically related to the rate reconciliation and income taxes paid. ASU 2023-09 is effective for our annual periods beginning January 1, 2025, with early adoption permitted. The Company is currently evaluating the potential effect that the updated standard will have on the financial statement disclosures.

In November 2023, the FASB issued ASU 2023-07 “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures” which expands annual and interim disclosure requirements for reportable segments, primarily through enhanced disclosures about significant segment expenses. ASU 2023-07 is effective for our annual periods beginning January 1, 2024, and for interim periods beginning January 1, 2025, with early adoption permitted. The adoption is not expected to have a material impact on the Company’s Consolidated Financial Statements or disclosures.

3. Inventory

Our inventory, net of allowance for obsolescence of $4.0 million at June 30, 2024 and December 31, 2023, consisted of the following amounts:


	June 30, 2024		December 31, 2023
	(in thousands)
Inventory, net of allowance for obsolescence of $2,836	$	19,450	$	20,227
Work-in-process	804		1,412
Inventory - current	20,254		21,639
Raw materials - long term net of allowance of $1,168	937		701
Inventory - total	$	21,191	$	22,340

Our long-term inventory consists of raw materials that remain viable but that the Company does not expect to sell or use within one year.

Inventory Allowance

We routinely review our inventory allowance balance to account for slow moving or obsolete inventory costs that may not be recoverable in the future.

A summary of our inventory allowance is as follows:


	June 30, 2024		December 31, 2023
	(in thousands)
Beginning balance	$	4,004	$	120
Accruals	—		3,965
Write-offs	—		(81)
Ending balance	$	4,004	$	4,004

4. Federal Income Tax Receivable

On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act ("CARES Act") was enacted in response to the economic impact caused by the COVID-19 pandemic. The CARES Act allowed NOLs incurred in 2018, 2019, and 2020 to be carried back to each of the five preceding taxable years to generate a refund of previously paid federal income taxes. The Company generated significant NOLs during 2018 and 2019, and has filed amended returns to carryback these losses for five years. Accordingly, during 2020, the Company recorded a federal income tax receivable of $15.0 million and an increase to its deferred income tax liability of $10.1 million on its condensed consolidated balance sheet. During the third quarter of 2020, the Company received refunds totaling $3.9 million related to its 2018 NOLs, which reduced its federal income tax receivable to $11.4 million and $11.5 million on its condensed consolidated balance sheet as of June 30, 2024 and December 31, 2023, respectively.

5. Rental Equipment

Our rental equipment and associated accumulated depreciation as of June 30, 2024 and December 31, 2023, respectively, consisted of the following:


	June 30, 2024		December 31, 2023
	(in thousands)
Compressor units	$	544,397	$	514,527
Work-in-process	48,566		50,867
Rental equipment	592,963		565,394
Accumulated depreciation	(204,632)		(191,745)
Rental equipment, net of accumulated depreciation	$	388,331	$	373,649

We evaluated our rental equipment for potential material impairment as of June 30, 2024, and determined that an immaterial impairment of less than $0.1 million existed as of that date.

6. Long-term Debt

Our long-term debt consists of the following:


	June 30, 2024		December 31, 2023
	(in thousands)


Total long-term debt	$	163,000	$	164,000

Amended and Restated Credit Agreement

On May 11, 2021, we entered into a five-year senior secured revolving credit agreement ("Credit Agreement") with Texas Capital Bank, National Association (the "Lender") with an initial commitment of $20 million and an accordion feature that would increase the maximum commitment to $30 million, subject to collateral availability. On December 12, 2022, we entered into a First Amendment to the Credit Agreement (the "First Amendment") to increase the maximum commitment to $30 million. We also have a right to request from the Lender, on an uncommitted basis, an increase of up to $30 million on the aggregate commitment; provided, however, the aggregate commitment amount is not permitted to exceed $50 million. The maturity date of the Credit Agreement was May 11, 2026. The obligations under the Credit Agreement were secured by a first priority lien on a variety of our assets, including inventory and accounts receivable as well as a variable number of our leased compressor equipment.

On February 28, 2023, we replaced our prior credit agreement by entering into a five-year senior secured revolving credit agreement (“Amended and Restated Credit Agreement”) with the Lender, as administrative agent, TCBI Securities, Inc., as joint lead arranger and sole book runner and Bank of America, N.A., as joint lead arranger, with an initial commitment of $175 million as of the closing date. Subject to collateral availability, we also have a right to request from the Lender, on an uncommitted basis, an increase of up to $125 million on the aggregate commitment; provided, however, the aggregate commitment amount is not permitted to exceed $300 million. The maturity date of the Amended and Restated Credit Agreement is February 28, 2028. The obligations under the Amended and Restated Credit Agreement are secured by a first priority lien on most of our assets, including inventory and accounts receivable as well as a variable number of our leased

compressor equipment. In connection with the amendment we agreed to pay fees of $2.0 million (representing fees equal to 1.39% of the $145 million increase in the commitment) and reimburse the lenders for their expenses.

On November 14, 2023, the Company entered into a First Amendment to the Amended and Restated Credit Agreement (the "Amendment") with the Lender, as administrative agent and certain other lenders to (i) increase the lender commitment from $175 million to $225 million, and (ii) to add First-Citizens Bank & Trust Company as a new lender to the facility. In connection with the Amendment, we agreed to pay fees of $0.6 million (representing fees equal to 1.125% of the $50 million increase in the commitment) and reimburse the lenders for their expenses.

On June 6, 2024, the Company entered into a Second Amendment to the Amended and Restated Credit Agreement (the "Second Amendment") with the Lender and certain other lenders primarily to (i) increase the aggregate lender commitment from $225 million to $300 million, (ii) revise the leverage ratio covenant (as more fully describe below) and (iii) to add Zions Bancorporation, N.A. (dba Amegy Bank) as a new lender to under the facility. The Company also agreed to fees of $0.9 million (representing 1.125% of the $75 million increase in the commitment) and reimburse the lenders for their expenses.

On June 25, 2024, the Company entered into a Third Amendment to the Amended and Restated Credit Agreement (the "Third Amendment") with the Lender, as administrative agent and the lenders thereto to increase the potential aggregate commitment of the existing credit facility from $300 million to $350 million. Under the Third Amendment, the Company has a right to request from the Lender, on an uncommitted basis, an increase of up to $50 million on the aggregate commitment; provided, however, the aggregate commitment amount is not permitted to exceed $350 million. We also agreed to reimburse the lenders for their expenses.

As of June 30, 2024, we were in compliance with all financial covenants in our Amended and Restated Credit Agreement. As of June 30, 2024, we had approximately $163 million outstanding under our Amended and Restated Credit Agreement with a weighted average interest rate of 8.93%. At June 30, 2024, we had approximately $119.7 million available for borrowing under the Amended and Restated Credit Agreement, subject to borrowing base determination.

Borrowing Base. At any time before the maturity of the Amended and Restated 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) 85% of eligible accounts receivable owed to the Company, plus (b) 50% of the eligible inventory, valued at the lower of cost or market value at such time, subject to a cap of this component not to exceed $2.5 million, plus (c) the lesser of (i) 95% of the net book value of the compressors that the Lender has determined are eligible for the extension of credit, valued at the lower of cost or market value with depreciation not to exceed 25 years, at such time and (ii) 80% of the net liquidation value percentage of the net book value of the eligible compressors that the Lender has determined are eligible for the extension of credit, valued at the lower of cost or market value with depreciation not to exceed 25 years, at such time, plus (d) 80% of the net book value, valued at the lower of cost (excluding any costs for capitalized interest or other noncash capitalized costs) or market of the eligible new compressor fleet, minus (e) any required availability reserves determined by the Lender in its sole discretion. 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 and Restated Credit Agreement, we have the option of selecting the applicable variable rate for each revolving loan, or portion thereof, of either (a) the Base Rate (as defined below) plus the Applicable Margin, or (b) in the case of a Term SOFR (“Secured Overnight Financing Rate”) Loan, the Adjusted Term SOFR rate plus the Applicable Margin. "Base Rate" means, for any day, a rate of interest per annum equal to the highest of (a) the prime rate for such day; (b) the sum of the federal funds rate for such day plus 0.50%; and (c) the Adjusted Term SOFR for such day plus 1.00%. The Applicable Margin is determined based upon the leverage ratio as set forth in the most recent compliance certificate received by the Lender for each fiscal quarter from time to time pursuant to the Amended and Restated Credit Agreement. Depending on the leverage ratio, the Applicable Margin can be 2.00% to 2.75% for Base Rate Loans (as defined in the Amended and Restated Credit Agreement) and 3.00% to 3.75% for Term SOFR Loans and for requested letters of credit. In addition, we are required to pay a monthly commitment fee on the daily average unused amount of the commitment while the Amended and Restated Credit Agreement is in effect at an annual rate equal to 0.50% of the unused commitment amount. Accrued interest is payable monthly on outstanding principal amounts and unused commitment fee, provided that accrued interest on Term SOFR Loans is payable at the end of each interest period, but in no event less frequently than quarterly.

Covenants. The Amended and Restated Credit Agreement contains customary representations and warranties, as well as covenants which, among other things, condition or 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 are subject to certain financial covenants in the Amended and Restated Credit Agreement that require us to maintain (i) a leverage ratio, as defined, lesser than or equal to (a) 3.50 to 1.00 as of the last day of each fiscal quarter ending on or prior to December 31, 2024, (b) 3.75 to 1.00 for the fiscal quarters ending on March 31, 2025 and June 30,

2025, (c) 3.50 to 1.00 for the fiscal quarters ending September 30, 2025, December 31, 2025 and March 31, 2026 and (d) 3.25 to 1.00 for the fiscal quarter ending June 30, 2026 and for each fiscal quarter thereafter and (ii) a fixed charge coverage ratio greater than or equal to 1.25 to 1.00 as of the last day of each fiscal quarter. As of June 30, 2024, the Company is in compliance with these covenants.

Events of Default and Acceleration. The Amended and Restated 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 Amended and Restated Credit Agreement and the other transaction 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 $1.0 million; certain bankruptcy or insolvency events; the rendering of certain judgments in excess of $1.0 million; certain ERISA events; certain change in control events and the defectiveness of any liens. Obligations outstanding under the Amended and Restated Credit Agreement may be accelerated upon the occurrence of an event of default.

7. Stock-Based and Other Long-Term Incentive Compensation

Stock Options

A summary of all option activity as of December 31, 2023, and changes during the six months ended June 30, 2024 is presented below:


	Number of Shares Underlying Stock Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (years)	Aggregate Intrinsic Value (in thousands)
Outstanding, December 31, 2023	129,751	$	20.59	4.10	$	274
Granted	44,000	$	23.10	12.46	$	—

Cancelled / Forfeited	(667)	$	10.58	—	$	3
Expired	(29,667)	$	30.41	—	$	—
Outstanding, June 30, 2024	143,417	19.37		6.30	$	476
Exercisable, June 30, 2024	77,584	$	19.73	3.81	$	268

The following table summarizes information about our stock options outstanding at June 30, 2024:


Range of Exercise Prices	Options Outstanding				Options Exercisable
	Shares	Weighted Average Remaining Contractual Life (years)	Weighted Average Exercise Price		Shares	Weighted Average Exercise Price
$0.01-18.00	51,000	7.76	$	10.77	29,167	$	10.93

$18.01-26.00	72,667	6.27	$	23.02	28,667	$	22.90
$26.01-30.00	19,750	2.63	$	28.15	19,750	$	28.15

	143,417	6.30	$	19.37	77,584	$	19.73

The following table summarizes changes in our unvested stock options for the six months ended June 30, 2024:



Unvested Stock Options:	Shares	Weighted Average Grant Date Fair Value Per Share
Unvested at December 31, 2023	24,335	$	5.45
Granted	44,000	$	12.46
Vested, outstanding shares	(2,502)	$	6.57

Cancelled/Forfeited	—	$	—
Unvested at June 30, 2024	65,833	$	10.09

As of June 30, 2024, there was $0.4 million of unrecognized compensation cost related to unvested options. For the six months and three months ended June 30, 2024, there was less than $0.1 million of compensation expense for stock options, respectively. For the six months and three months ended June 30, 2023, there was less than $0.1 million of compensation expense for stock options.

Restricted Shares/Units and Performance Share Units

The following summarizes grants made of equity awards under our 2019 Equity Incentive Plan, as amended, on the dates indicated:

• On April 25, 2023, the Compensation Committee awarded 27,840 shares of restricted stock units to James R. Hazlett, our Chief Technical Officer, that vest ratably over three years, beginning on April 25, 2024.

• Pursuant to the Retirement Agreement dated May 17, 2022, between the Company and Stephen. Taylor, on April 25, 2023, the Compensation Committee awarded 58,790 fully vested shares of common stock to Mr. Taylor.

•On May 9, 2023, the Compensation Committee awarded each of our four independent Board members 9,470 restricted stock units ("RSU"). These RSUs vest one year from the date of grant. With respect to the 9,470 share RSU award received by Justin Jacobs, at the time of grant, he was an employee of Mill Road Capital Management, LLC (“Mill Road”), and was serving on our Board pursuant to a right of appointment held by Mill Road in connection with a Cooperation Agreement between Mill Road and us. Pursuant to a pre-existing contractual obligation, Mill Road has the right to receive the economic benefit of the shares upon vesting of this RSU. On January 29, 2024, Mr. Jacobs terminated his employment with Mill Road and on February 12, 2024, he began employment as our permanent Chief Executive Officer. As a result, since he no longer qualified as an independent member of our Board, Mr. Jacobs relinquished the vesting of 2,252 shares representing the pro-rata number of shares allocable under the award since the beginning his employment in February. Thus, these shares have not been issued and remain in our 2019 Plan for future award grants. In connection with the contractual obligation noted above, 6,856 of the vested shares are in the process of being transferred by Mr. Jacobs to Mill Road for no consideration, and Mr. Jacobs continues to own 362 of the vested shares relating the period between his termination of employment with Mill Road and employment as our CEO.

• On June 30, 2023, Mr. Taylor, in connection with his agreement to continue as our Interim Chief Executive Officer while we finalized our permanent CEO search, was granted RSUs for 10,101 shares of common stock that vested on June 30, 2024. In addition, Mr. Taylor was also issued 10,101 shares of common stock pursuant to his Retirement Agreement.

• On October 8, 2023, the Compensation Committee awarded 6,361 restricted stock units to Brian Tucker, our Chief Operating Officer. These units will vest ratably over three years beginning on October 9, 2024.

• On October 26, 2023, the compensation committee awarded 4,623 restricted stock units to Georganne Hodges upon her appointment as an independent director. These units vest one year from the date of the grant.

• On January 29, 2024, the compensation committee awarded Mr. Jacobs, our Chief Executive Officer, 31,382 restricted stock units and two performance share unit ("PSU") awards, one for 6,494 shares representing a signing bonus and another for 31,382 shares representing an award for 2024 (pro-rated). The restricted stock units vest over three years in equal tranches beginning on the one-year anniversary of the grant date.

•On March 4, 2024, the compensation committee awarded Mr. Tucker our Chief Operating Officer 11,293 restricted stock units and 11,293 performance share units. These restricted stock units vest over three years in equal tranches beginning on the one-year anniversary of the grant date.

•In addition on March 14, 2024, the compensation committee awarded Mr. Hazlett, our Chief Technical Officer, 21,984 restricted stock units. These restricted stock units vest over three years in equal tranches beginning on the one-year anniversary of the grant date. In connection with Mr. Hazlett's recent retirement on August 1, 2024, we adjusted the vesting terms of the RSUs to correspond with the term of his post-retirement consulting agreement.

•On June 13, 2024, the Compensation Committee awarded each of our four independent Board members 5,620 RSUs. These RSUs vest 1 year from the date of grant.

In connection with the performance share unit awards granted to Messrs. Jacobs and Tucker set forth above, potential payout for the PSU award is based upon performance for a three-year period ending December 31, 2026 measured against relative total shareholder return (“TSR”) compared to a peer group as established by the Compensation Committee. The PSU award payout ranges from zero (if the Company ranks below the 30th percentile) and up to 200% for Mr. Jacobs and Mr. Tucker, the CEO and the Chief Operating Officer, respectively, (if the Company ranks first) based upon the Company’s relative TSR performance ranking (subject to certain caps based on absolute TSR).

Total compensation expense related to these and previously granted restricted stock awards was $0.4 million and $1.6 million for the six months ended June 30, 2024, and 2023, respectively. Total compensation expense related to these and previously granted restricted stock awards was $0.2 million and $1.1 million for the three months ended June 30, 2024 and 2023, respectively.

A summary of all restricted stock/units outstanding as of December 31, 2023 and activity during the six months ended June 30, 2024 is presented below:


	Number of Shares	Weighted Average Grant Date Fair Value		Weighted Average Remaining Contractual Life (years)	Aggregate Intrinsic Value (in thousands)
Outstanding, December 31, 2023	133,898	$	10.66	1.57	$	1,813
Granted	83,294	$	17.58		$	1,464
Vested	(52,505)	$	10.26		$	1,149
Canceled/Forfeited	(21,147)	$	11.12		$	235
Outstanding, June 30, 2024	143,540	$	14.82	5.13	$	2,888

8. Earnings per Share

The following table reconciles the numerators and denominators of the basic and diluted earnings per share computation:


	Three months ended				Six months ended
	June 30,				June 30,
	2024		2023		2024		2023
	(in thousands, except per share data)
Numerator:
Net income	$	4,250	$	504	$	9,348	$	874
Denominator for earnings per basic common share:
Weighted average common shares outstanding	12,384		12,292		12,392		12,253
Denominator for earnings per diluted common share:
Weighted average common shares outstanding	12,384		12,292		12,392		12,253
Dilutive effect of stock options and restricted stock/units	99		102		92		121
Diluted weighted average shares	12,483		12,394		12,484		12,374
Earnings per common share:
Basic	$	0.34	$	0.04	$	0.75	$	0.07
Diluted	$	0.34	$	0.04	$	0.75	$	0.07

9. Commitments and Contingencies

From time to time, we are a party to various legal proceedings in the ordinary course of our business. We are not currently a party to any material legal proceedings, and we are not aware of any threatened material litigation. The Company believes it maintains adequate insurance coverage against any potential litigation loss relating to insurable risks.

10. Subsequent Events

In accordance with ASC 855 - Subsequent Events - the Company has evaluated all events subsequent to the balance sheet date as of June 30, 2024 through the date this report was issued and believes nothing is required to be reported thereunder.

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The discussion and analysis of our financial condition and results of operations are based on, and should be read in conjunction with, our condensed consolidated financial statements and the related notes included elsewhere in this report and in our Annual Report on Form 10-K for the year ended December 31, 2023 filed with the SEC (the "Annual Report").

This report and our Annual Report, as amended, contain 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 report as well as our Annual Report, 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.

Please read Item 1A, Risk Factors, in our Annual Report, as it contains important factors that could cause actual results to differ materially from the expectations reflected in the forward-looking statements.

Overview

We design, rent, sell, service and maintain natural gas compressors for oil and natural gas production and plant facilities, generally using equipment from third-party fabricators and OEM suppliers along with limited in-house assembly. Some assembly work is done in-house with an increasing amount done by third-party contractors. 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 than our small and medium horsepower units. 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 June 30, 2024, we had 1,242 natural gas compressors totaling 454,568 horsepower rented to 73 customers compared to 1,249 natural gas compressors totaling 372,596 horsepower rented to 75 customers at June 30, 2023. The decline in the number of rented units and customers as of June 30, 2024 from the previous year is consistent with our strategy to move more toward rental of high horsepower compression units.

We also design natural gas compressors for sale to our customers 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 minimum three to twelve 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. Finally due to supply chain disruptions and the increased rate of inflation over recent years, we continue to experience cost increases and sporadic unavailability of many of our parts needed to fabricate and maintain our rental fleet. While we have a robust supplier network, pricing pressure from our customers and competitors may present challenges in increasing our rental rates to offset these increased costs which 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 primarily use third-party contractors for fabrication and these companies may experience the same risks.

In December 2023, we decided to cease fabrication of new compressor units for sale or rental to customers at our Midland, Texas facility. We continue to maintain limited new unit compressor assembly capability at our Tulsa, Oklahoma facility as well as having relationships with multiple outsourced compressor fabrication providers.

We also design and assemble 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 assembly of compressor units for sale or rental by us or sell the finished component products to other compressor fabricators. Although we have significantly de-emphasized our flare product line, we continue to hold a limited inventory of 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 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 aftermarket services to our non-rental customers under written maintenance contracts or on an as-required basis in the absence of a service contract.

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 result in greater revenues and profits for service and equipment companies.

Generally, higher commodity prices lead to higher capital expenditures by oil and natural gas producers and higher levels of production. In general, we expect our overall business activity and revenues to track the level of activity in the oil and natural gas industry, specifically production levels, 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 latter 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 single and multiple larger horsepower compressor packages. We recognized this need and shifted our focus towards designing, fabricating and renting gas compressor packages that range from 400 horsepower up to 2,500 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. In recent years, our level of activity has become more largely driven by the price of crude oil as opposed to natural gas. During the first quarter of 2020, due to COVID, we saw a substantial decline in the prices for oil and natural gas. While prices largely recovered in 2021 and then stabilized more recently, activity levels of exploration and production companies have been and will continue to be dependent not only on commodity prices, but also on their ability to generate sufficient operational cash flow to fund their activities. Generally, we believe that the level of demand for our compressor services is more closely tied to production activities, which are likely to fare better than drilling activity in periods of declining commodity prices.

For fiscal year 2024, our forecasted capital expenditures will be directly dependent upon our customers’ compression requirements and our capital availability, while maintaining prudent levels of debt. We believe that cash on hand, cash flows from operations and borrowings under our revolving credit facility will be sufficient to satisfy our capital and liquidity requirements through 2024. If we require additional capital to fund any significant unanticipated expenditures, including any material acquisitions of other businesses, joint ventures or other opportunities, this additional capital could exceed our current resources, might not be available to us when we need it, or might not be available on acceptable terms.

Industry Update

Crude oil prices have remained relatively stable since 2022. Historically, activity levels of exploration and production companies have been dependent on commodity prices. However, recent capital market focus on cash returns from exploration and production companies has restricted capital spending below levels that have historically been observed during higher commodity price environments. Generally, though, we believe that production activities (in which we are involved) will fare better than drilling activity, which tend to decline during times of lower crude oil and natural gas prices. This is reflected in both the stability of our rental revenues, which is driven by production activities, and the volatility of our compressor sales, which tends to fluctuate with customers' capital allocations. As such, we still expect compressor sales to be low for the foreseeable future, as exploration and production companies have elected to rent compression units rather than allocating capital dollars to purchase new compression. Accordingly, we have chosen to deemphasize the new unit fabrication portion of our business and instead focus our efforts on our rental business.

Results of Operations

Three months ended June 30, 2024, compared to the three months ended June 30, 2023.

The table below shows our revenues and percentage of total revenues of each of our product lines for the three months ended June 30, 2024 and 2023.


	Three months ended June 30,
	2024				2023
	(in thousands)
Rental	$	34,926	90.7	%		$	24,105	89.4	%
Sales	2,270		5.9	%		1,595		5.9	%
Aftermarket service	1,295		3.4	%		1,257		4.7	%
Total	$	38,491				$	26,957

Total revenue increased 42.8% to $38.5 million for the three months ended June 30, 2024 compared to $27.0 million for the three months ended June 30, 2023. This increase was primarily a result of higher rental revenue (44.9% increase) during 2024.

Rental revenue increased to $34.9 million for the three months ended June 30, 2024 compared to $24.1 million for the same period in 2023. This increase during the second quarter of 2024 was attributable to an increase rented horsepower, especially high horsepower compression, as well as selective rental rate increases.

As of June 30, 2024, we had 1,899 compressor packages in our fleet, down from 1,911 units at June 30, 2023 due to the retirement of units during the fourth quarter of 2023 and the disposition of a small number of compressor units, partially offset by the of new fleet additions over the last twelve months. The Company's total unit horsepower increased to 552,599 horsepower at June 30, 2024 compared to 473,884 horsepower at June 30, 2023, due to additions to the Company's fleet of 55 high horsepower compressors over the past 12 months. As of June 30, 2024, we had 1,242 natural gas compressors with a total of 454,568 horsepower rented to 73 customers, compared to 1,249 natural gas compressors with a total of 372,596 horsepower rented to 75 customers as of June 30, 2023. As a result of the addition of high horsepower units during 2023 and these units being rented to customers, our total rented horsepower as of June 30, 2024 increased by 22.0% over the last twelve months. Our rental fleet had unit utilization as of June 30, 2024, and 2023, respectively, of 65.4% and 65.4%, and our horsepower utilization for the same dates increased to 82.3% from 78.6%. Our total rented horsepower increased by 22.0% contrasted against a small decrease in the number of total rented units. This illustrates the growing demand for our high horsepower units while the demand for our smaller and medium horsepower units has remained relatively constant over this time period.

Sales revenue increased 42.3% to $2.3 million for the three months ended June 30, 2024 compared to $1.6 million for the three months ended June 30, 2023. This increase is primarily attributable to higher parts sales during the second quarter of 2024 compared to the same period in 2023. Sales are subject to fluctuations in timing of industry activity related to our customers' capital projects and, as such, can vary substantially between periods and due in part to this, we have decided to shift the focus of our business away from sales of new compressor packages to renting our owned units to our customers.

Aftermarket service revenue increased 3.0% to $1.3 million for the three months ended June 30, 2024 compared to $1.3 million for the three months ended June 30, 2023. This increase is primarily attributable to slightly more revenue from commissioning of new units during the three months ended June 30, 2024 compared to the same quarter in the previous year.

Cost of rentals increased to $14.2 million during the three months ended June 30, 2024 compared to $11.3 million during the three months ended June 30, 2023. This 25.4% increase in costs of rentals is primarily due to more rented horsepower during the second quarter of 2024.

Cost of sales increased 19.9% to $2.2 million during the three months ended June 30, 2024 compared to $1.9 million during the three months ended June 30, 2023. This increase was primarily due to higher sales activity.

Selling, general, and administrative ("SG&A") expenses decreased 1.4% to $4.8 million for the three months ended June 30, 2024 compared $4.9 million during the same period in 2023. SG&A decreased due to lower stock compensation expense and legal fees largely offset by higher salaries, commissions, consulting expenses and public company costs.

Depreciation and amortization expense increased to $7.7 million for the three months ended June 30, 2024 compared to $6.4 million for the three months ended June 30, 2023, due to depreciation expense for high horsepower units acquired during 2023 and 2024.

Interest expense increased to $2.9 million for the three months ended June 30, 2024 compared to $0.2 million for the three months ended June 30, 2023, due to higher balances outstanding on our credit facility.

We recorded an income tax expense of approximately $1.3 million for the three months ended June 30, 2024 compared to an income tax expense of $0.2 million for the three months ended June 30, 2023. For interim periods, our income tax expense is computed based upon our estimated annual effective tax rate and any discrete items that impact the interim periods. Our estimated annual effective tax rate differs from the U.S. federal statutory rate of 21% primarily as a result of certain expenses not being deductible for income tax purposes.

Six months ended June 30, 2024, compared to the six months ended June 30, 2023.

The table below shows our revenues and percentage of total revenues of each of our product lines for the six months ended June 30, 2024 and 2023.


	Six months ended June 30,
	2024				2023
	(in thousands)
Rental	$	68,660	91.1	%	$	46,828	87.4	%
Sales	4,773		6.3	%	4,587		8.6	%
Aftermarket services	1,965		2.6	%	2,162		4.0	%
Total	$	75,398			$	53,577

Total revenue increased 40.7% to $75.4 million for the six months ended June 30, 2024 compared to $53.6 million during the six months ended June 30, 2023. This increase was primarily a result of higher rental revenue (46.6% increase) slightly offset by lower aftermarket service revenue during the first six months of 2024 (9.1% decrease).

Rental revenue increased to $68.7 million for the six months ended June 30, 2024 compared to $46.8 million during the six months ended June 30, 2023. This increase during the first six months of 2024 was attributable to an increase in rented compression horsepower and rental rate increases.

Sales revenue increased to $4.8 million for the six months ended June 30, 2024 compared to $4.6 million for the same period in 2023. This increase is mostly attributable to higher sales of compressor packages in 2024 compared to 2023. Sales are subject to fluctuations in timing of industry activity related to capital projects and, as such, can vary substantially between periods.

Aftermarket service revenue decreased (9.1)% to $2.0 million for the six months ended June 30, 2024 compared to $2.2 million for the six months ended June 30, 2023. This decrease is primarily attributable to lower volume of service call-out work performed during the six months ended June 30, 2024 compared to the same period in the previous year.

Cost of rentals increased 18.9% to $27.3 million during the six months ended June 30, 2024 compared to $23.0 million during the six months ended June 30, 2023. This increase was primarily due to increase in rental compression horsepower in service. While repair and maintenance expenses are customary in our business, the timing of such expenses can fluctuate between periods resulting in periods with larger than normal expenses.

Cost of sales decreased 13.4% to $4.4 million during the six months ended June 30, 2024 compared to $5.1 million during the six months ended June 30, 2023. This decrease during the first six months of 2024 was primarily due to lower fabrication costs attributable to our fabrication shops and lower costs of parts sold.

Selling, general, and administrative expenses increased 0.8% to $9.5 million for the six months ended June 30, 2024 compared to $9.4 million for the same period in 2023. SG&A expenses during the first six months of 2024 were impacted by higher consulting expenses, commissions and public company costs partially offset by lower severance expenses and legal fees during 2024.

Depreciation and amortization expense increased 17.6% to $14.8 million for the six months ended June 30, 2024 compared to $12.6 million for the six months ended June 30, 2023. This increase was the result of units placed into service during 2023 & 2024.

Interest expense increased to $5.9 million for the six months ended June 30, 2024 from $0.2 million for the six months ended June 30, 2023, due to higher balances outstanding on our credit facility.

We recorded an income tax expense of $2.8 million for the six months ended June 30, 2024 and $0.4 million for the six months ended June 30, 2023. For interim periods, our income tax (expense) benefit is computed based upon our estimated annual effective tax rate and any discrete items that impact the interim periods.

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 non-cash stock compensation, severance expenses, impairment expenses, 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, and as a basis for strategic planning and forecasting.

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 results of operations of different companies. Please read the table below under “Reconciliation” to see how Adjusted EBITDA

reconciles to our net (loss) income, for the three months ended and the six months ended June 30, 2024 and 2023, the most directly comparable GAAP financial measure.

Reconciliation

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


	Three months ended June 30,				Six months ended June 30,
	2024		2023		2024		2023
	(in thousands)
Net income	$	4,250	$	504	$	9,348	$	874
Interest expense	2,932		185		5,867		185
Income tax expense	1,294		249		2,773		396
Depreciation and amortization	7,705		6,418		14,792		12,583
Non-cash stock compensation expense	242		1,130		516		1,617
Severance expenses	33		612		33		1,224
Impairment Expense	—		779		—		779

Retirement of rental equipment	—		—		5		—
Adjusted EBITDA	$	16,456	$	9,877	$	33,334	$	17,658

For the three months ended June 30, 2024, Adjusted EBITDA increased $6.6 million, or 66.6%, due primarily to a $10.8 million increase in rental revenues partially offset by a $2.9 million increase in costs of rentals. For the six months ended June 30, 2024, Adjusted EBITDA increased $15.7 million, or 88.8%, due primarily to a $21.8 million increase in rental revenues partially offset by a $4.4 million increase in costs of rentals.

Liquidity and Capital Resources

Our working capital positions as of June 30, 2024 and December 31, 2023 are set forth below:


	June 30,		December 31,
	2024		2023
	(in thousands)
Current Assets:
Cash and cash equivalents	$	3,616	$	2,746
Trade accounts receivable, net	33,001		39,186
Inventory	20,254		21,639
Federal income tax receivable	11,386		11,538

Prepaid expenses and other	2,139		1,162
Total current assets	70,396		76,271
Current Liabilities:
Accounts payable	23,336		17,628
Accrued liabilities	6,803		15,085




Total current liabilities	30,139		32,713
Total working capital	$	40,257	$	43,558

For the six months ended June 30, 2024, we invested $28.3 million in rental equipment and other equipment by adding approximately $28.2 million in new equipment to our rental fleet and less than $0.1 million primarily in other machinery and equipment. Our investment in rental equipment and other equipment also includes any changes to work-in-process related to our rental fleet jobs at the beginning of the period compared to the end of the period. Our rental work-in-process decreased by $2.2 million during the six months ended June 30, 2024. We financed our investment in rental equipment, property and other

equipment with cash flow from operations, and borrowings under our Amended and Restated Credit Facility. We anticipate that our cash flows from operations as well as our borrowing capacity under our Amended and Restated Credit Agreement will provide adequate liquidity for our planned capital expenditures during the remainder of 2024. For any new capital expenditures in 2024 and beyond that exceeds our cash flow from operations and our borrowing base under our Amended and Restated Credit Agreement, we anticipate that we would need to negotiate an expansion of our borrowing capacity under our Amended and Restated Credit Agreement or raise money in the capital markets through sales of equity or debt securities. While we control the timing and extent of our capital expenditures, there is no assurance that any such borrowing expansion would be granted. At June 30, 2024 we had approximately $119.7 million available for borrowing under the Amended and Restated Credit Agreement, subject to borrowing base determination.

Cash flows

At June 30, 2024, we had cash and cash equivalents of $3.6 million compared to $2.7 million at December 31, 2023. Our cash flows from operating activities of $31.1 million were offset by capital expenditures of $28.3 million during the six months ended June 30, 2024. We had working capital of $40.3 million at June 30, 2024 compared to $43.6 million at December 31, 2023. We generated cash flows from operating activities of $31.1 million during the first six months of 2024 compared to cash flows provided by operating activities of $22.6 million for the first six months of 2023.

Business Strategy

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

•Optimize existing utilized fleet. We believe there are opportunities to modestly improve the profitability of our existing utilized rental fleet through targeted price increases, particularly in geographic areas that have experienced high rates of cost inflation, along with operational efficiencies by using improved data collection and analysis to optimize our costs in labor, parts, and maintenance costs.

•Improve asset utilization. We believe we can improve the overall cash flow of the business by increasing utilization of the existing fleet as well as creating investable cash from non-cash assets. We have a significant number of unutilized units—we will review these assets to determine where relatively low-cost capital expenditures can improve the marketability and cash flow potential of the units. We also have a significant amount of capital tied up in non-cash assets (including working capital and fixed assets) that we believe can be monetized and invested back in the fleet at or above target levels of return on invested capital.

•Expand rental fleet. We intend to prudently increase the size of our rental fleet mainly through pre-contracted agreements with our customers. We believe our future growth in this part of our strategy will be primarily driven through our placement of larger horsepower, centralized wellhead natural gas compressors for unconventional oil production, with select increases in medium horsepower units to meet customer demand beyond our inventory.

•Execute accretive mergers and acquisitions. We believe there are opportunities in mergers with or acquisitions of competitive rental compression companies or related businesses providing similar services. While there is no certainty as to the probability of any particular deal, we will continue to evaluate potential acquisitions, joint ventures and other opportunities that could enhance value for our shareholders.

Critical Accounting Policies and Practices

Our condensed consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States. 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. Management has determined that our critical accounting policies are those that relate to revenue recognition, estimating the allowance for doubtful accounts, accounting for income taxes, accounting for long-lived assets and accounting for inventory.

There have been no changes in the critical accounting policies disclosed in the Company's Form 10-K for the year ended December 31, 2023.

Recently Issued Accounting Pronouncements

Please read Note 2, Summary of Significant Accounting Policies, Recently Issued Accounting Pronouncements in our condensed consolidated financial statements in 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 June 30, 2024, the off-balance sheet arrangements and transactions that we have entered into include purchase agreements. We do not believe that these arrangements are reasonably likely to materially affect our liquidity or availability of capital resources.

Special Note Regarding Forward-Looking Statements

Except for historical information contained herein, the statements in this report are forward-looking and made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements involve known and unknown risks and uncertainties, which may cause our actual results in future periods to differ materially from forecasted results. Those risks include, among other things, (i) achieving increased utilization of assets, including rental fleet utilization and unlocking other non-cash balance sheet assets; (ii) failure of projected organic growth due to adverse changes in the oil and gas industry, including depressed oil and gas prices, oppressive environmental regulations and competition; (iii) inability to finance capital expenditures; (iv) adverse changes in customer, employee or supplier relationships; (v) adverse regional and national economic and financial market conditions, including in our key operating areas; (vi) impacts of world events, including pandemics; the financial condition of the Company’s customers and failure of significant customers to perform their contractual obligations; (vii) the Company’s ability to economically develop and deploy new technologies and services, including technology to comply with health and environmental laws and regulations; (viii) failure to achieve accretive financial results in connection with any acquisitions the Company may make (ix) the loss of market share through competition or otherwise, including the introduction of competing technologies by other companies; and (x) prolonged, substantial reduction in oil and natural gas prices, which could cause a decline in the demand for our products and services. The forward-looking statements included in this Form 10-Q are only made as of the date of this report, and we undertake no obligation to publicly update such forward-looking statements to reflect subsequent events or circumstances. A discussion of these and other risk factors is included in our Annual Report on Form 10-K for the year ended December 31, 2023 filed with the SEC.

Item 3. Quantitative and Qualitative Disclosures about Market Risk

There have been no changes in the market risks disclosed in the Company's Form 10-K for the year ended December 31, 2023.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures.

Our management, including the Chief Executive Officer and our Interim Chief Financial Officer, is responsible for establishing and maintaining adequate internal control over financial reporting (“ICFR”), as defined in Rule 13a-15(f) and 15d-15(f) under the Exchange Act. Our internal control over financial reporting is designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of the consolidated financial statements for external purposes in accordance with GAAP.

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.

Our management conducted an evaluation of the effectiveness of the Company’s internal control over financial reporting as of June 30, 2024, based on the Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

Based on the results of this evaluation, the Company’s management concluded that internal control over financial reporting was not effective as of June 30, 2024, due to the material weakness listed below.

A material weakness is a deficiency, or a combination of deficiencies, in ICFR, 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 identified a material weakness in its internal control over financial reporting at December 31, 2022, over our inventory process which still exists as of June 30, 2024. Specifically, we have identified issues related to: (i) year-end physical inventory count procedures, and (ii) the process to review and approve inventory adjusting journal entries.

After giving full consideration to this material weakness, and the additional analyses and other procedures that we performed to ensure that our condensed consolidated financial statements included herein were prepared in accordance with U.S. generally accepted accounting principles (“US GAAP”), our management has concluded that our condensed consolidated financial statements present fairly, in all material respects our financial position, results of operations and cash flows for the periods disclosed in conformity with US GAAP.

Remediation Plan for Material Weakness

In response to the material weakness, management, with oversight of the Audit Committee of the Board of Directors, has begun the process of, and is committed to, designing and implementing effective measures to strengthen our internal controls over financial reporting and remediate the material weakness.

Our planned internal control remediation efforts, which continue, include:

•We have updated and implemented new accounting policies and procedures related to work in process inventory. These included modifying our financial reporting account consolidation procedures and financial review process.

•We have hired additional management with a focus on inventory control and inventory best practices.

•We are continuing to limit the amount of inventory held outside of centralized warehouses.

•We have improved and enforced our formalized inventory count and inventory adjustment processes which includes taking steps to reinforce the inventory taking procedures, proper training and supervision of warehouse staff.

•We have added additional inventory safeguards in our warehouses limiting physical access to our inventory.

•We have limited the number of employees who can make inventory adjustments in our accounting software by adding additional IT controls around inventory transfers.

•We have engaged a third-party consultant to conduct a full assessment of our controls and procedures.

•We intend to continue efforts to ensure our employees understand the ongoing importance of internal controls and compliance with corporate policies and procedures.

•We have added a highly qualified new member to our board of directors and expanded our audit committee

We feel that the outcome of the actions discussed above have yielded favorable results to date. We are continuing to evaluate the effectiveness of these actions and we will require additional validation and testing of the design and operating effectiveness of internal controls over a sustained period of financial reporting cycles. We are committed to the continuous improvement of our internal control over financial reporting and will diligently review our internal control over financial reporting on an ongoing basis.

PART II – OTHER INFORMATION

Item 1. Legal Proceedings

From time to time, we are a party to various legal proceedings in the ordinary course of our business. We are not currently a party to any material legal proceedings.

Item 1A. Risk Factors

Please refer to and read Item 1A, Risk Factors in our Annual Report on Form 10-K for the fiscal year ended December 31, 2023 for a discussion of the risks associated with our Company and the industry in which we operate..

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

None.

Item 3. Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

None.

Item 5. Other Information

None

Item 6. Exhibits

The following exhibits are filed herewith or incorporated herein by reference, as indicated:


Exhibit No.			Description

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

3.2			Bylaws as amended (Incorporated by reference to Exhibit 3.1 of the Registrant's current report on form 8-K filed with the Securities and Exchange Commission on February 10, 2021.

4.1			Description of Securities (Incorporated by reference to the Registrant's Registration Statement on From 8-A, filed with the SEC on October 27, 2008.)

4.2			Form of Senior Indenture (Incorporated by reference to Exhibit 4.1 of the Registrant's Registration Statement on From S-3 (No. 333-261091) and filed on November 16, 2021.)

4.3			Form of Subordinated Indenture (Incorporated by reference to Exhibit 4.4 of the Registrant's Registration Statement on Form S-3 (No. 333-261091) and filed on November 16, 2021.)


10.1†			2019 Equity Incentive Plan, as amended (Incorporated by reference to Exhibit 4.3 of the Registrant’s Registration Statement on Form S-8 filed with the Securities and Exchange Commission on July 12, 2022.)

10.2†			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.)



10.3†			Retirement Agreement dated May 17, 2022 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 May 19, 2022.)

10.4†			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.)

10.5			Amended and Restated Credit Agreement dated February 28, 2023, among Natural Gas Services Group, Inc., the other Loan Parties thereto, Texas Capital Bank, in its capacity as Administrative Agent and the Lenders party thereto (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 March 6, 2023.)


10.6			Amended and Restated Pledge and Security Agreement dated February 28, 2023, among Natural Gas Services Group, Inc., the Grantors thereto, Texas Capital Bank, in its capacity as Administrative Agent, for the Lenders and other Secured Parties (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 March 6, 2023.)

10.7			Third Amendment to Amended and Restated Credit Agreement dated June 25, 2024, among Natural Gas Services Group, Inc., the other Loan Parties thereto, Texas Capital Bank, in its capacity as Administrative Agent and the Lenders party thereto (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 28, 2024.)

10.8 †			Retention Agreement dated September19, 2023 between Natural Gas Services Group, Inc. and James Hazlett (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 November 14, 2023.)

10.9 †			Employment Agreement between Brian L. Tucker and Natural Gas Services Group, Inc. dated October 9, 2023 (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 October 10, 2023.)

10.10†			Employment Agreement between Justin C. Jacobs and Natural Gas Services Group, Inc. dated January 29, 2024 (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 February 1, 2024.)

10.11†			Employee Non-Compete Agreement between Justin C. Jacobs and Natural Gas Services Group, Inc. dated January 29, 2024 (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 February 1, 2024.)

10.12†			Employee Proprietary Rights Agreement between Justin C. Jacobs and Natural Gas Services Group, Inc. dated January 29, 2024 (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 February 1, 2024.)

10.13†			Form of Restricted Stock Unit Award under the Natural Gas Services Group, Inc. 2019 Equity Incentive Plan, as amended (Incorporated by reference to Exhibit 10.12 of the Registrant’s Annual Report on Form 10-K filed with the Securities and Exchange Commission on April 1, 2024.)

10.14†			Form of Performance Stock Unit Award under the Natural Gas Services Group, Inc. 2019 Equity Incentive Plan, as amended (Incorporated by reference to Exhibit 10.13 of the Registrant’s Annual Report on Form 10-K filed with the Securities and Exchange Commission on April 1, 2024.)

10.15†			Interim CEO Agreement between Natural Gas Services Group, Inc. and Stephen C. Taylor dated June 30, 2023, as extended on December 31, 2023 (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 July 5, 2023.)

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

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

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

32.2*			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.
			† Indicates a management contract or compensatory plan or arrangement

SIGNATURES

Pursuant to the requirements 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.

NATURAL GAS SERVICES GROUP, INC.


/s/ Justin C. Jacobs						/s/ John Bittner
Justin C. Jacobs						John Bittner
Chief Executive Officer						Interim Chief Financial Officer
(Principal Executive Officer)						(Principal Accounting Officer)

August 14, 2024						August 14, 2024

Exhibit 31.1

Certifications

I, Justin C. Jacobs, certify that:

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

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:

August 14, 2024

Natural Gas Services Group, Inc.

By:

/s/ Justin C. Jacobs

Justin C. Jacobs

Director and Chief Executive Officer

(Principal Executive Officer)

Exhibit 31.2

Certifications

I, John Bittner, certify that:

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

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:

August 14, 2024

Natural Gas Services Group, Inc.

By:

/s/John Bittner

John Bittner

Interim 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 Quarterly Report of Natural Gas Services Group, Inc. (the “Company”) on Form 10-Q for the period ended June 30, 2024 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Justin C. Jacobs, Interim 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:

August 14, 2024

Natural Gas Services Group, Inc.

By:

/s/ Justin C. Jacobs

Justin C. Jacobs

Director and Chief Executive Officer

(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 Quarterly Report of Natural Gas Services Group, Inc. (the “Company”) on Form 10-Q for the period ended June 30, 2024 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, John Bittner, Interim 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:

August 14, 2024

Natural Gas Services Group, Inc.

By:

/s/ John Bittner

John Bittner

Interim Chief Financial Officer

(Principal Accounting Officer)

Cover - shares	6 Months Ended
Cover - shares	Jun. 30, 2024	Aug. 05, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2024
Document Transition Report	false
Entity File Number	1-31398
Entity Registrant Name	NATURAL GAS SERVICES GROUP, INC.
Entity Incorporation, State or Country Code	CO
Entity Tax Identification Number	75-2811855
Entity Address, Address Line One	404 Veterans Airpark Ln., Ste 300
Entity Address, City or Town	Midland
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	79705
City Area Code	432
Local Phone Number	262-2700
Title of 12(b) Security	Common Stock, Par Value $0.01
Trading Symbol	NGS
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		12,466,875
Entity Central Index Key	0001084991
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2
Amendment Flag	false

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current Assets:
Cash and cash equivalents	$ 3,616	$ 2,746
Trade accounts receivable, net of allowance for doubtful accounts of $1,110 and $823, respectively	33,001	39,186
Inventory, net of allowance for obsolescence of $2,836	20,254	21,639
Federal income tax receivable	11,386	11,538
Prepaid expenses and other	2,139	1,162
Total current assets	70,396	76,271
Long-term inventory, net of allowance for obsolescence of $1,168	937	701
Rental equipment, net of accumulated depreciation of $204,632 and $191,745, respectively	388,331	373,649
Property and equipment, net of accumulated depreciation of $18,273 and $17,649, respectively	19,584	20,550
Intangibles, net of accumulated amortization of $2,447 and $2,384, respectively	712	775
Other assets	9,205	6,783
Total assets	489,165	478,729
Current Liabilities:
Accounts payable	23,336	17,628
Accrued liabilities	6,803	15,085
Total current liabilities	30,139	32,713
Long-term debt	163,000	164,000
Deferred income tax liability	44,290	41,636
Other long-term liabilities	6,076	4,486
Total liabilities	243,505	242,835
Commitments and contingencies (Note 9)
Stockholders’ Equity:
Preferred stock, 5,000 shares authorized, no shares issued or outstanding	0	0
Common stock, 30,000 shares authorized, par value $0.01; 13,727 and 13,688 shares issued, respectively	137	137
Additional paid-in capital	116,898	116,480
Retained earnings	143,629	134,281
Treasury shares, at cost, 1,310 shares	(15,004)	(15,004)
Total stockholders' equity	245,660	235,894
Total liabilities and stockholders' equity	$ 489,165	$ 478,729

CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
ASSETS
Allowance for doubtful accounts	$ 1,110	$ 823
Allowance for inventory obsolescence, current	2,836	2,836
Allowance for inventory obsolescence, noncurrent	1,168	1,168
Accumulated depreciation, rental equipment	204,632	191,745
Accumulated depreciation, property and equipment	18,273	17,649
Accumulated amortization, intangibles	$ 2,447	$ 2,384
Stockholders’ Equity:
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, shares authorized (in shares)	30,000,000	30,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares issued (in shares)	13,727,000	13,688,000
Treasury shares (in shares)	1,310,000	1,310,000

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue:
Rental income	$ 34,926	$ 24,105	$ 68,660	$ 46,828
Total revenue from contracts with customers	3,565	2,852	6,738	6,749
Total revenue	38,491	26,957	75,398	53,577
Operating costs and expenses:
Cost of rentals, exclusive of depreciation stated separately below	14,228	11,343	27,342	22,988
Cost of sales, exclusive of depreciation stated separately below	2,249	1,876	4,429	5,113
Cost of aftermarket services, exclusive of depreciation stated separately below	1,012	969	1,512	1,578
Selling, general and administrative expenses	4,791	4,860	9,493	9,422
Depreciation and amortization	7,705	6,418	14,792	12,583
Impairment expense	0	779	0	779
Retirement of rental equipment	0	0	5	0
Total operating costs and expenses	29,985	26,245	57,573	52,463
Operating income	8,506	712	17,825	1,114
Other income (expense):
Interest expense	(2,932)	(185)	(5,867)	(185)
Other income (expense), net	(30)	226	163	341
Total other income (expense), net	(2,962)	41	(5,704)	156
Income before provision for income taxes	5,544	753	12,121	1,270
Income tax expense	(1,294)	(249)	(2,773)	(396)
Net income	$ 4,250	$ 504	$ 9,348	$ 874
Earnings per share:
Basic (in dollars per share)	$ 0.34	$ 0.04	$ 0.75	$ 0.07
Diluted (in dollars per share)	$ 0.34	$ 0.04	$ 0.75	$ 0.07
Weighted average shares outstanding:
Basic (in shares)	12,384	12,292	12,392	12,253
Diluted (in shares)	12,483	12,394	12,484	12,374
Sales
Revenue:
Total revenue from contracts with customers	$ 2,270	$ 1,595	$ 4,773	$ 4,587
Aftermarket services
Revenue:
Total revenue from contracts with customers	$ 1,295	$ 1,257	$ 1,965	$ 2,162

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock
Beginning balance (in shares) at Dec. 31, 2022		0
Beginning balance at Dec. 31, 2022	$ 230,076	$ 0	$ 135	$ 115,411	$ 129,534	$ (15,004)
Beginning balance (in shares) at Dec. 31, 2022			13,519,000
Beginning balance (in shares) at Dec. 31, 2022						1,310,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Compensation expense on common stock options	22			22
Issuance of restricted stock (in shares)			29,000
Compensation expense on restricted common stock	465			465
Taxes paid related to net shares settlement of equity awards	(184)			(184)
Net income (loss)	370				370
Ending balance (in shares) at Mar. 31, 2023		0
Ending balance at Mar. 31, 2023	230,749	$ 0	$ 135	115,714	129,904	$ (15,004)
Ending balance (in shares) at Mar. 31, 2023			13,548,000
Ending balance (in shares) at Mar. 31, 2023						1,310,000
Beginning balance (in shares) at Dec. 31, 2022		0
Beginning balance at Dec. 31, 2022	230,076	$ 0	$ 135	115,411	129,534	$ (15,004)
Beginning balance (in shares) at Dec. 31, 2022			13,519,000
Beginning balance (in shares) at Dec. 31, 2022						1,310,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	874
Ending balance (in shares) at Jun. 30, 2023		0
Ending balance at Jun. 30, 2023	231,585	$ 0	$ 136	116,045	130,408	$ (15,004)
Ending balance (in shares) at Jun. 30, 2023			13,688,000
Ending balance (in shares) at Jun. 30, 2023						1,310,000
Beginning balance (in shares) at Mar. 31, 2023		0
Beginning balance at Mar. 31, 2023	230,749	$ 0	$ 135	115,714	129,904	$ (15,004)
Beginning balance (in shares) at Mar. 31, 2023			13,548,000
Beginning balance (in shares) at Mar. 31, 2023						1,310,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Compensation expense on common stock options	30			30
Issuance of restricted stock (in shares)			140,000
Issuance of restricted stock	0		$ 1	(1)
Compensation expense on restricted common stock	1,100			1,100
Taxes paid related to net shares settlement of equity awards	(798)			(798)
Net income (loss)	504				504
Ending balance (in shares) at Jun. 30, 2023		0
Ending balance at Jun. 30, 2023	$ 231,585	$ 0	$ 136	116,045	130,408	$ (15,004)
Ending balance (in shares) at Jun. 30, 2023			13,688,000
Ending balance (in shares) at Jun. 30, 2023						1,310,000
Beginning balance (in shares) at Dec. 31, 2023	0	0
Beginning balance at Dec. 31, 2023	$ 235,894	$ 0	$ 137	116,480	134,281	$ (15,004)
Beginning balance (in shares) at Dec. 31, 2023	13,688,000		13,688,000
Beginning balance (in shares) at Dec. 31, 2023	1,310,000					1,310,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Compensation expense on common stock options	$ 29			29
Compensation expense on restricted common stock	245			245
Taxes paid related to net shares settlement of equity awards (in shares)			6,000
Net income (loss)	5,098				5,098
Ending balance (in shares) at Mar. 31, 2024		0
Ending balance at Mar. 31, 2024	$ 241,266	$ 0	$ 137	116,754	139,379	$ (15,004)
Ending balance (in shares) at Mar. 31, 2024			13,694,000
Ending balance (in shares) at Mar. 31, 2024						1,310,000
Beginning balance (in shares) at Dec. 31, 2023	0	0
Beginning balance at Dec. 31, 2023	$ 235,894	$ 0	$ 137	116,480	134,281	$ (15,004)
Beginning balance (in shares) at Dec. 31, 2023	13,688,000		13,688,000
Beginning balance (in shares) at Dec. 31, 2023	1,310,000					1,310,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 9,348
Ending balance (in shares) at Jun. 30, 2024	0	0
Ending balance at Jun. 30, 2024	$ 245,660	$ 0	$ 137	116,898	143,629	$ (15,004)
Ending balance (in shares) at Jun. 30, 2024	13,727,000		13,727,000
Ending balance (in shares) at Jun. 30, 2024	1,310,000					1,310,000
Beginning balance (in shares) at Mar. 31, 2024		0
Beginning balance at Mar. 31, 2024	$ 241,266	$ 0	$ 137	116,754	139,379	$ (15,004)
Beginning balance (in shares) at Mar. 31, 2024			13,694,000
Beginning balance (in shares) at Mar. 31, 2024						1,310,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Compensation expense on common stock options	46			46
Compensation expense on restricted common stock	196			196
Taxes paid related to net shares settlement of equity awards (in shares)			33,000
Taxes paid related to net shares settlement of equity awards	(98)			(98)
Net income (loss)	$ 4,250				4,250
Ending balance (in shares) at Jun. 30, 2024	0	0
Ending balance at Jun. 30, 2024	$ 245,660	$ 0	$ 137	$ 116,898	$ 143,629	$ (15,004)
Ending balance (in shares) at Jun. 30, 2024	13,727,000		13,727,000
Ending balance (in shares) at Jun. 30, 2024	1,310,000					1,310,000

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 9,348	$ 874
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	14,792	12,583
Amortization of debt issuance costs	315	184
Deferred income tax expense	2,654	396
Stock-based compensation	516	1,617
Provision from credit losses	287	128
Impairment expense	0	779
Gain on sale of assets	(229)	(206)
Retirement of rental equipment	5	0
Gain on company owned life insurance	(173)	(80)
Changes in operating assets and liabilities:
Trade accounts receivables	5,898	(6,332)
Inventory	1,149	(4,438)
Prepaid expenses and prepaid income taxes	(825)	(301)
Accounts payable and accrued liabilities	(2,575)	16,888
Deferred income	(418)	(37)
Other	375	588
NET CASH PROVIDED BY OPERATING ACTIVITIES	31,119	22,643
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of rental equipment, property and other equipment	(28,262)	(93,479)
Purchase of company owned life insurance	(17)	(329)
Proceeds from sale of property and equipment	355	231
Proceeds from surrender of company owned life insurance	43	0
NET CASH USED IN INVESTING ACTIVITIES	(27,881)	(93,577)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from loan	8,000	75,011
Repayment of loan	(9,000)	0
Payments of other long-term liabilities, net	(385)	(50)
Payments of debt issuance costs	(885)	(2,131)
Taxes paid related to net share settlement of equity awards	(98)	(982)
NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES	(2,368)	71,848
NET CHANGE IN CASH AND CASH EQUIVALENTS	870	914
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	2,746	3,372
CASH AND CASH EQUIVALENTS AT END OF PERIOD	3,616	4,286
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Interest paid	10,458	1,966
NON-CASH TRANSACTIONS
Transfer of rental equipment to inventory	0	708
Right of use asset acquired through a finance lease	$ 1,751	$ 63

Description of Business	6 Months Ended
Description of Business	Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of BusinessNatural 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. We design, rent, sell, service and maintain natural gas compressors for oil and natural gas production and plant facilities, generally using equipment from third-party fabricators and OEM suppliers along with limited in-house assembly. NGS is headquartered in Midland, Texas, with a fabrication facility located in Tulsa, Oklahoma, a rebuild shop in 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.

Summary of Significant Accounting Policies

6 Months Ended

Jun. 30, 2024

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Principles of Consolidation and Basis of Presentation

Revenue Recognition Policy

Nature of Goods and Services

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

Disaggregation of Revenue

The following table shows the Company's revenue disaggregated by product or service type for the three months and six months ended June 30, 2024 and 2023:


	Three months ended June 30,				Six months ended June 30,
	2024		2023		2024		2023
	(in thousands)				(in thousands)
Compressors - sales	$	58	$	38	$	1,341	$	1,007

Other (parts/rebuilds) - sales	2,212		1,557		3,432		3,580
Aftermarket services	1,295		1,257		1,965		2,162
Total revenue from contracts with customers	3,565		2,852		6,738		6,749
Add: ASC 842 rental revenue	34,926		24,105		68,660		46,828
Total revenue	$	38,491	$	26,957	$	75,398	$	53,577

Contract Balances

As of June 30, 2024 and December 31, 2023, we had the following receivables and deferred income from contracts with customers:


	June 30, 2024		December 31, 2023
	(in thousands)
Accounts Receivable
Accounts receivable - contracts with customers	$	5,593	$	7,138
Accounts receivable - ASC 842	28,518		32,871
Total Accounts Receivable	34,111		40,009
Less: Allowance for doubtful accounts	(1,110)		(823)
Total Accounts Receivable, net	$	33,001	$	39,186

Deferred income	$	—	$	418

The Company recognized sales revenues of $0.4 million for the six months ended June 30, 2024 that was included in accrued liabilities at the beginning of 2024.

The decrease in accounts receivable and deferred income were primarily due to normal timing differences between our performance and the customers’ payments.

Remaining Performance Obligations

As of June 30, 2024, the Company had no deferred revenue related to unsatisfied performance obligations.

Contract Costs

Income Taxes

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

Capitalized Interest

Recently Issued Accounting Pronouncements

Inventory

6 Months Ended

Jun. 30, 2024

Inventory Disclosure [Abstract]

Inventory

Our inventory, net of allowance for obsolescence of $4.0 million at June 30, 2024 and December 31, 2023, consisted of the following amounts:


	June 30, 2024		December 31, 2023
	(in thousands)
Inventory, net of allowance for obsolescence of $2,836	$	19,450	$	20,227
Work-in-process	804		1,412
Inventory - current	20,254		21,639
Raw materials - long term net of allowance of $1,168	937		701
Inventory - total	$	21,191	$	22,340

Our long-term inventory consists of raw materials that remain viable but that the Company does not expect to sell or use within one year.

Inventory Allowance

We routinely review our inventory allowance balance to account for slow moving or obsolete inventory costs that may not be recoverable in the future.

A summary of our inventory allowance is as follows:


	June 30, 2024		December 31, 2023
	(in thousands)
Beginning balance	$	4,004	$	120
Accruals	—		3,965
Write-offs	—		(81)
Ending balance	$	4,004	$	4,004

Federal Income Tax Receivable	6 Months Ended
Federal Income Tax Receivable	Jun. 30, 2024
Income Tax Disclosure [Abstract]
Federal Income Tax Receivable	Federal Income Tax ReceivableOn March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act ("CARES Act") was enacted in response to the economic impact caused by the COVID-19 pandemic. The CARES Act allowed NOLs incurred in 2018, 2019, and 2020 to be carried back to each of the five preceding taxable years to generate a refund of previously paid federal income taxes. The Company generated significant NOLs during 2018 and 2019, and has filed amended returns to carryback these losses for five years. Accordingly, during 2020, the Company recorded a federal income tax receivable of $15.0 million and an increase to its deferred income tax liability of $10.1 million on its condensed consolidated balance sheet. During the third quarter of 2020, the Company received refunds totaling $3.9 million related to its 2018 NOLs, which reduced its federal income tax receivable to $11.4 million and $11.5 million on its condensed consolidated balance sheet as of June 30, 2024 and December 31, 2023, respectively.

Rental Equipment

6 Months Ended

Jun. 30, 2024

Property, Plant and Equipment [Abstract]

Rental Equipment

Our rental equipment and associated accumulated depreciation as of June 30, 2024 and December 31, 2023, respectively, consisted of the following:


	June 30, 2024		December 31, 2023
	(in thousands)
Compressor units	$	544,397	$	514,527
Work-in-process	48,566		50,867
Rental equipment	592,963		565,394
Accumulated depreciation	(204,632)		(191,745)
Rental equipment, net of accumulated depreciation	$	388,331	$	373,649

We evaluated our rental equipment for potential material impairment as of June 30, 2024, and determined that an immaterial impairment of less than $0.1 million existed as of that date.

Long-term Debt

6 Months Ended

Jun. 30, 2024

Debt Disclosure [Abstract]

Long-term Debt

Our long-term debt consists of the following:


	June 30, 2024		December 31, 2023
	(in thousands)


Total long-term debt	$	163,000	$	164,000

Amended and Restated Credit Agreement

Stock-Based and Other Long-Term Incentive Compensation

6 Months Ended

Jun. 30, 2024

Share-Based Payment Arrangement [Abstract]

Stock-Based and Other Long-Term Incentive Compensation

Stock Options

A summary of all option activity as of December 31, 2023, and changes during the six months ended June 30, 2024 is presented below:


	Number of Shares Underlying Stock Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (years)	Aggregate Intrinsic Value (in thousands)
Outstanding, December 31, 2023	129,751	$	20.59	4.10	$	274
Granted	44,000	$	23.10	12.46	$	—

Cancelled / Forfeited	(667)	$	10.58	—	$	3
Expired	(29,667)	$	30.41	—	$	—
Outstanding, June 30, 2024	143,417	19.37		6.30	$	476
Exercisable, June 30, 2024	77,584	$	19.73	3.81	$	268

The following table summarizes information about our stock options outstanding at June 30, 2024:


Range of Exercise Prices	Options Outstanding				Options Exercisable
	Shares	Weighted Average Remaining Contractual Life (years)	Weighted Average Exercise Price		Shares	Weighted Average Exercise Price
$0.01-18.00	51,000	7.76	$	10.77	29,167	$	10.93

$18.01-26.00	72,667	6.27	$	23.02	28,667	$	22.90
$26.01-30.00	19,750	2.63	$	28.15	19,750	$	28.15

	143,417	6.30	$	19.37	77,584	$	19.73

The following table summarizes changes in our unvested stock options for the six months ended June 30, 2024:



Unvested Stock Options:	Shares	Weighted Average Grant Date Fair Value Per Share
Unvested at December 31, 2023	24,335	$	5.45
Granted	44,000	$	12.46
Vested, outstanding shares	(2,502)	$	6.57

Cancelled/Forfeited	—	$	—
Unvested at June 30, 2024	65,833	$	10.09

Restricted Shares/Units and Performance Share Units

The following summarizes grants made of equity awards under our 2019 Equity Incentive Plan, as amended, on the dates indicated:

•On June 13, 2024, the Compensation Committee awarded each of our four independent Board members 5,620 RSUs. These RSUs vest 1 year from the date of grant.

A summary of all restricted stock/units outstanding as of December 31, 2023 and activity during the six months ended June 30, 2024 is presented below:


	Number of Shares	Weighted Average Grant Date Fair Value		Weighted Average Remaining Contractual Life (years)	Aggregate Intrinsic Value (in thousands)
Outstanding, December 31, 2023	133,898	$	10.66	1.57	$	1,813
Granted	83,294	$	17.58		$	1,464
Vested	(52,505)	$	10.26		$	1,149
Canceled/Forfeited	(21,147)	$	11.12		$	235
Outstanding, June 30, 2024	143,540	$	14.82	5.13	$	2,888

Earnings per Share

6 Months Ended

Jun. 30, 2024

Earnings Per Share [Abstract]

Earnings per Share

The following table reconciles the numerators and denominators of the basic and diluted earnings per share computation:


	Three months ended				Six months ended
	June 30,				June 30,
	2024		2023		2024		2023
	(in thousands, except per share data)
Numerator:
Net income	$	4,250	$	504	$	9,348	$	874
Denominator for earnings per basic common share:
Weighted average common shares outstanding	12,384		12,292		12,392		12,253
Denominator for earnings per diluted common share:
Weighted average common shares outstanding	12,384		12,292		12,392		12,253
Dilutive effect of stock options and restricted stock/units	99		102		92		121
Diluted weighted average shares	12,483		12,394		12,484		12,374
Earnings per common share:
Basic	$	0.34	$	0.04	$	0.75	$	0.07
Diluted	$	0.34	$	0.04	$	0.75	$	0.07

Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Jun. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and ContingenciesFrom time to time, we are a party to various legal proceedings in the ordinary course of our business. We are not currently a party to any material legal proceedings, and we are not aware of any threatened material litigation. The Company believes it maintains adequate insurance coverage against any potential litigation loss relating to insurable risks.

Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2024
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In accordance with ASC 855 - Subsequent Events - the Company has evaluated all events subsequent to the balance sheet date as of June 30, 2024 through the date this report was issued and believes nothing is required to be reported thereunder.

Summary of Significant Accounting Policies (Policies)	6 Months Ended
Summary of Significant Accounting Policies (Policies)	Jun. 30, 2024
Accounting Policies [Abstract]
Principles of Consolidation and Basis of Presentation	Principles of Consolidation and Basis of Presentation The accompanying unaudited condensed consolidated financial statements include the accounts of the Company, its subsidiary, NGSG Properties, LLC, which owns the Company's headquarters office building and the rabbi trust associated with the Company's deferred compensation plan. All significant intercompany accounts and transactions for the periods presented have been eliminated in consolidation. These financial statements include all adjustments, consisting of only normal recurring adjustments, which are necessary to make our financial position at June 30, 2024 and the results of our operations for the three months and six ended June 30, 2024 and 2023 not misleading. Some adjustments may cause the prior year number in these financial statements to differ from the prior year interim financial statements. As permitted by the rules and regulations of the Securities and Exchange Commission (the "SEC"), the accompanying condensed consolidated financial statements do not include all disclosures normally required by generally accepted accounting principles in the United States of America (GAAP). These financial statements should be read in conjunction with the consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2023 on file with the SEC. In our opinion, the condensed consolidated financial statements are a fair presentation of the financial position, results of operations, changes in stockholders' equity and cash flows for the periods presented. The results of operations for the three and six months ended June 30, 2024 are not necessarily indicative of the results of operations to be expected for the full fiscal year ending December 31, 2024.
Revenue Recognition Policy and Contract Costs	Revenue Recognition Policy Revenue is measured based on the consideration and terms 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 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 during the rental contract. Our rental contracts typically range from six to 60 months. Our revenue is recognized over time, with 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 with 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 and parts, as well as exchange/rebuilding customer owned compressors and sale of used rental equipment. Our sales revenue is recognized in accordance with ASC 606. Custom compressors - The Company designs and assembles compressors 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 is completed and shipped, or in accordance with a bill and hold arrangement, in which the customer accepts title and assumes the risk and rewards of ownership at a specified time. We request some of our customers to make progressive payments as the compressor is being built; these payments are recorded as a contract liability on the Accrued Liability 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. 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 rebuild 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 or rebuilt 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 - From time to time, a customer may request to purchase a used compressor 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. Aftermarket Service Revenue. The Company provides routine or call-out services on customer owned equipment as well as commissioning of new units for customers. Revenue is recognized after services in the contract are rendered. Payment terms for sales revenue and aftermarket services 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. 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 expenses on our condensed consolidated statements of operations.
Income Taxes	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 carryforwards. 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. Valuation allowances are established to reduce deferred tax assets when it is more likely than not that some portion or all of the deferred tax assets will not be realized. To the extent we establish a valuation allowance or increase this allowance in a period, we include an expense in the tax provision in our condensed consolidated statements of operations. We account for uncertain tax positions in accordance with guidance in 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 condensed consolidated financial statements. Tax benefits are recognized only for tax positions that are more likely than not to be sustained upon examination by tax authorities. The amount recognized is measured as the largest amount of benefit that is greater than 50% likely to be realized upon settlement. A liability for unrecognized tax benefits is recorded for any tax benefits claimed in our tax returns that do not meet these recognition and measurement standards. We have no liabilities for uncertain tax positions as of June 30, 2024. Our policy regarding income tax interest and penalties is to expense those items as interest expense and other expense, respectively.
Capitalized Interest	Capitalized Interest The Company capitalizes interest from external borrowings on significant expenditures for the fabrication of its natural gas compressor equipment until such projects are ready for their intended use. Capitalized interest is added to the cost of the underlying asset and is amortized over the useful lives of the assets in the same manner as the underlying assets.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In December 2023, the Financial Standards Accounting Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-09 “Income Taxes (Topics 740): Improvements to Income Tax Disclosures” to expand the disclosure requirements for income taxes, specifically related to the rate reconciliation and income taxes paid. ASU 2023-09 is effective for our annual periods beginning January 1, 2025, with early adoption permitted. The Company is currently evaluating the potential effect that the updated standard will have on the financial statement disclosures. In November 2023, the FASB issued ASU 2023-07 “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures” which expands annual and interim disclosure requirements for reportable segments, primarily through enhanced disclosures about significant segment expenses. ASU 2023-07 is effective for our annual periods beginning January 1, 2024, and for interim periods beginning January 1, 2025, with early adoption permitted. The adoption is not expected to have a material impact on the Company’s Consolidated Financial Statements or disclosures.

Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2024

Accounting Policies [Abstract]

Schedule of Disaggregation of Revenue

The following table shows the Company's revenue disaggregated by product or service type for the three months and six months ended June 30, 2024 and 2023:


	Three months ended June 30,				Six months ended June 30,
	2024		2023		2024		2023
	(in thousands)				(in thousands)
Compressors - sales	$	58	$	38	$	1,341	$	1,007

Other (parts/rebuilds) - sales	2,212		1,557		3,432		3,580
Aftermarket services	1,295		1,257		1,965		2,162
Total revenue from contracts with customers	3,565		2,852		6,738		6,749
Add: ASC 842 rental revenue	34,926		24,105		68,660		46,828
Total revenue	$	38,491	$	26,957	$	75,398	$	53,577

Schedule of Contract with Customer, Asset and Liability

As of June 30, 2024 and December 31, 2023, we had the following receivables and deferred income from contracts with customers:


	June 30, 2024		December 31, 2023
	(in thousands)
Accounts Receivable
Accounts receivable - contracts with customers	$	5,593	$	7,138
Accounts receivable - ASC 842	28,518		32,871
Total Accounts Receivable	34,111		40,009
Less: Allowance for doubtful accounts	(1,110)		(823)
Total Accounts Receivable, net	$	33,001	$	39,186

Deferred income	$	—	$	418

Inventory (Tables)

6 Months Ended

Jun. 30, 2024

Inventory Disclosure [Abstract]

Schedule of Inventory

Our inventory, net of allowance for obsolescence of $4.0 million at June 30, 2024 and December 31, 2023, consisted of the following amounts:


	June 30, 2024		December 31, 2023
	(in thousands)
Inventory, net of allowance for obsolescence of $2,836	$	19,450	$	20,227
Work-in-process	804		1,412
Inventory - current	20,254		21,639
Raw materials - long term net of allowance of $1,168	937		701
Inventory - total	$	21,191	$	22,340

A summary of our inventory allowance is as follows:


	June 30, 2024		December 31, 2023
	(in thousands)
Beginning balance	$	4,004	$	120
Accruals	—		3,965
Write-offs	—		(81)
Ending balance	$	4,004	$	4,004

Rental Equipment (Tables)

6 Months Ended

Jun. 30, 2024

Property, Plant and Equipment [Abstract]

Schedule of Rental Equipment

Our rental equipment and associated accumulated depreciation as of June 30, 2024 and December 31, 2023, respectively, consisted of the following:


	June 30, 2024		December 31, 2023
	(in thousands)
Compressor units	$	544,397	$	514,527
Work-in-process	48,566		50,867
Rental equipment	592,963		565,394
Accumulated depreciation	(204,632)		(191,745)
Rental equipment, net of accumulated depreciation	$	388,331	$	373,649

Long-term Debt (Tables)

6 Months Ended

Jun. 30, 2024

Debt Disclosure [Abstract]

Schedule of Long-Term Debt

Our long-term debt consists of the following:


	June 30, 2024		December 31, 2023
	(in thousands)


Total long-term debt	$	163,000	$	164,000

Stock-Based and Other Long-Term Incentive Compensation (Tables)

6 Months Ended

Jun. 30, 2024

Share-Based Payment Arrangement [Abstract]

Schedule of Option Activity

A summary of all option activity as of December 31, 2023, and changes during the six months ended June 30, 2024 is presented below:


	Number of Shares Underlying Stock Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (years)	Aggregate Intrinsic Value (in thousands)
Outstanding, December 31, 2023	129,751	$	20.59	4.10	$	274
Granted	44,000	$	23.10	12.46	$	—

Cancelled / Forfeited	(667)	$	10.58	—	$	3
Expired	(29,667)	$	30.41	—	$	—
Outstanding, June 30, 2024	143,417	19.37		6.30	$	476
Exercisable, June 30, 2024	77,584	$	19.73	3.81	$	268

Schedule of Stock Options Outstanding

The following table summarizes information about our stock options outstanding at June 30, 2024:


Range of Exercise Prices	Options Outstanding				Options Exercisable
	Shares	Weighted Average Remaining Contractual Life (years)	Weighted Average Exercise Price		Shares	Weighted Average Exercise Price
$0.01-18.00	51,000	7.76	$	10.77	29,167	$	10.93

$18.01-26.00	72,667	6.27	$	23.02	28,667	$	22.90
$26.01-30.00	19,750	2.63	$	28.15	19,750	$	28.15

	143,417	6.30	$	19.37	77,584	$	19.73

Schedule of Status of Unvested Stock Options

The following table summarizes changes in our unvested stock options for the six months ended June 30, 2024:



Unvested Stock Options:	Shares	Weighted Average Grant Date Fair Value Per Share
Unvested at December 31, 2023	24,335	$	5.45
Granted	44,000	$	12.46
Vested, outstanding shares	(2,502)	$	6.57

Cancelled/Forfeited	—	$	—
Unvested at June 30, 2024	65,833	$	10.09

Schedule of Restricted Stock Activity

A summary of all restricted stock/units outstanding as of December 31, 2023 and activity during the six months ended June 30, 2024 is presented below:


	Number of Shares	Weighted Average Grant Date Fair Value		Weighted Average Remaining Contractual Life (years)	Aggregate Intrinsic Value (in thousands)
Outstanding, December 31, 2023	133,898	$	10.66	1.57	$	1,813
Granted	83,294	$	17.58		$	1,464
Vested	(52,505)	$	10.26		$	1,149
Canceled/Forfeited	(21,147)	$	11.12		$	235
Outstanding, June 30, 2024	143,540	$	14.82	5.13	$	2,888

Earnings per Share (Tables)

6 Months Ended

Jun. 30, 2024

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table reconciles the numerators and denominators of the basic and diluted earnings per share computation:


	Three months ended				Six months ended
	June 30,				June 30,
	2024		2023		2024		2023
	(in thousands, except per share data)
Numerator:
Net income	$	4,250	$	504	$	9,348	$	874
Denominator for earnings per basic common share:
Weighted average common shares outstanding	12,384		12,292		12,392		12,253
Denominator for earnings per diluted common share:
Weighted average common shares outstanding	12,384		12,292		12,392		12,253
Dilutive effect of stock options and restricted stock/units	99		102		92		121
Diluted weighted average shares	12,483		12,394		12,484		12,374
Earnings per common share:
Basic	$	0.34	$	0.04	$	0.75	$	0.07
Diluted	$	0.34	$	0.04	$	0.75	$	0.07

Summary of Significant Accounting Policies - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Revenue from External Customer [Line Items]
Revenue recognized			$ 400,000
Deferred income	$ 0		$ 0		$ 418,000
Amortization period of capitalized contract costs	1 year		1 year
Uncertain tax positions	$ 0		$ 0
Capitalized interest	$ 1,200,000	$ 1,800,000	$ 2,400,000	$ 2,700,000
Rental Contracts, Excluding Large Horsepower Compressors \| Minimum
Revenue from External Customer [Line Items]
Rental contract term	6 months		6 months
Rental Contracts, Large Horsepower Compressors \| Maximum
Revenue from External Customer [Line Items]
Rental contract term	60 months		60 months

Summary of Significant Accounting Policies - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 3,565	$ 2,852	$ 6,738	$ 6,749
Add: ASC 842 rental revenue	34,926	24,105	68,660	46,828
Total revenue	38,491	26,957	75,398	53,577
Compressors - sales
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	58	38	1,341	1,007
Other (parts/rebuilds) - sales
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	2,212	1,557	3,432	3,580
Aftermarket services
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 1,295	$ 1,257	$ 1,965	$ 2,162

Summary of Significant Accounting Policies - Schedule of Contract with Customer, Asset and Liability (Details) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Accounts Receivable
Accounts receivable - contracts with customers	$ 5,593,000	$ 7,138,000
Accounts receivable - ASC 842	28,518,000	32,871,000
Total Accounts Receivable	34,111,000	40,009,000
Less: Allowance for doubtful accounts	(1,110,000)	(823,000)
Total Accounts Receivable, net	33,001,000	39,186,000
Deferred income	$ 0	$ 418,000

Inventory - Schedule of Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023	Dec. 31, 2022
Inventory Disclosure [Abstract]
Allowance for inventory obsolescence, current	$ 4,004	$ 4,004	$ 120
Allowance for inventory obsolescence, current	2,836	2,836
Inventory, net of allowance for obsolescence of $2,836	19,450	20,227
Work-in-process	804	1,412
Inventory - current	20,254	21,639
Allowance for inventory obsolescence, noncurrent	1,168	1,168
Raw materials - long term net of allowance of $1,168	937	701
Inventory - total	$ 21,191	$ 22,340

Inventory - Schedule of Inventory Allowance (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Inventory Valuation Reserves [Roll Forward]
Beginning balance	$ 4,004	$ 120
Accruals	0	3,965
Write-offs	0	(81)
Ending balance	$ 4,004	$ 4,004

Federal Income Tax Receivable (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2020	Jun. 30, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Federal income tax receivable		$ 15,000	$ 11,386	$ 11,538
Deferred tax liability increase due to tax law change		$ 10,100
Income tax received refunds	$ 3,900

Rental Equipment (Details) - USD ($) $ in Thousands	6 Months Ended
Rental Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Rental equipment	$ 592,963	$ 565,394
Accumulated depreciation	(204,632)	(191,745)
Rental equipment, net of accumulated depreciation	388,331	373,649
Impairment of rental equipment (less than)	100
Compressor units
Property, Plant and Equipment [Line Items]
Rental equipment	544,397	514,527
Work-in-process
Property, Plant and Equipment [Line Items]
Rental equipment	$ 48,566	$ 50,867

Long-term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Debt Disclosure [Abstract]
Total long-term debt	$ 163,000	$ 164,000

Long-term Debt - Narrative (Details) - Revolving credit facility $ in Millions						3 Months Ended						6 Months Ended
	Jun. 25, 2024 USD ($)	Jun. 06, 2024 USD ($)	Nov. 14, 2023 USD ($)	Feb. 28, 2023 USD ($)	May 11, 2021 USD ($)	Jun. 30, 2026	Mar. 31, 2026	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024 USD ($)	Jun. 24, 2024 USD ($)	Jun. 05, 2024 USD ($)	Nov. 13, 2023 USD ($)	Dec. 12, 2022 USD ($)
Line of Credit Facility [Line Items]
Debt instrument, term				5 years
Borrowing base amount available				$ 175.0
Aggregate credit agreement commitment	$ 350.0	$ 300.0	$ 225.0										$ 300.0	$ 225.0	$ 175.0	$ 30.0
Potential increase in borrowing capacity	50.0	75.0	50.0	125.0	$ 30.0
Potential maximum borrowing capacity	$ 350.0			300.0	$ 50.0
Amendment fees		$ 0.9	$ 0.6	$ 2.0
Amendment fees, percentage		1.125%	1.125%	1.39%
Increase in commitment				$ 145.0
Outstanding balance												$ 163.0
Weighted average interest rate												8.93%
Outstanding credit facility												$ 119.7
Percentage of eligible non investment grade decors				85.00%
Percentage of eligible inventory				50.00%
Line of credit facility, non exceeding cap of components				$ 2.5
Percentage of eligible compressors for extension of credit				95.00%
Term for depreciation				25 years
Percentage of net liquidation value of eligible compressors for extension of credit				80.00%
Percentage of eligible value at cost				80.00%
Unused commitment fee, rate				0.50%
Maximum leverage ratio allowed				3.50
Fixed charge coverage ratio				1.25
Forecast
Line of Credit Facility [Line Items]
Maximum leverage ratio allowed						3.25	3.50	3.50	3.50	3.75	3.75
Maximum
Line of Credit Facility [Line Items]
Default trigger, certain defaults of other company indebtedness, amount				$ 1.0
Default trigger, rendering of certain judgments, amount				$ 1.0
Federal Fund Rate
Line of Credit Facility [Line Items]
Variable rate, applicable margin				0.50%
SOFR Rate
Line of Credit Facility [Line Items]
Variable rate, applicable margin				1.00%
SOFR Rate \| Minimum
Line of Credit Facility [Line Items]
Variable rate, applicable margin				3.00%
SOFR Rate \| Maximum
Line of Credit Facility [Line Items]
Variable rate, applicable margin				3.75%
Base Rate \| Minimum
Line of Credit Facility [Line Items]
Variable rate, applicable margin				2.00%
Base Rate \| Maximum
Line of Credit Facility [Line Items]
Variable rate, applicable margin				2.75%
New Credit Agreement \| Line of Credit
Line of Credit Facility [Line Items]
Debt instrument, term					5 years
Borrowing base amount available					$ 20.0
Aggregate credit agreement commitment					$ 30.0

Stock-Based and Other Long-Term Incentive Compensation - Schedule of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Number of Shares Underlying Stock Options
Outstanding, beginning of period (in shares)	129,751
Granted (in shares)	44,000
Cancelled/Forfeited (in shares)	(667)
Expired (in shares)	(29,667)
Outstanding, end of period (in shares)	143,417	129,751
Exercisable (in shares)	77,584
Weighted AverageExercise Price
Outstanding, beginning of period (in dollars per share)	$ 20.59
Granted (in dollars per share)	23.10
Cancelled/Forfeited (in dollars per share)	10.58
Expired (in dollars per share)	30.41
Outstanding, end of period (in dollars per share)	19.37	$ 20.59
Exercisable (in dollars per share)	$ 19.73
WeightedAverageRemainingContractual Life (years)
Outstanding, weighted average remaining contractual life	6 years 3 months 18 days	4 years 1 month 6 days
Granted, weighted average remaining contractual life	12 years 5 months 15 days
Exercisable, weighted average remaining contractual life	3 years 9 months 21 days
AggregateIntrinsicValue(in thousands)
Outstanding, aggregate intrinsic value	$ 476	$ 274
Granted, aggregate intrinsic value	0
Cancelled/Forfeited, aggregate intrinsic value	3
Exercisable, aggregate intrinsic value	$ 268

Stock-Based and Other Long-Term Incentive Compensation - Schedule of Stock Options Outstanding (Details)	6 Months Ended
	Jun. 30, 2024 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding, shares (in shares) \| shares	143,417
Options outstanding, weighted average remaining contractual life (years)	6 years 3 months 18 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 19.37
Options exercisable, shares (in shares) \| shares	77,584
Options exercisable, weighted average exercise price (in dollars per share)	$ 19.73
$0.01-18.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit (in dollars per share)	0.01
Range of exercise prices, upper limit (in dollars per share)	$ 18.00
Options outstanding, shares (in shares) \| shares	51,000
Options outstanding, weighted average remaining contractual life (years)	7 years 9 months 3 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 10.77
Options exercisable, shares (in shares) \| shares	29,167
Options exercisable, weighted average exercise price (in dollars per share)	$ 10.93
$18.01-26.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit (in dollars per share)	18.01
Range of exercise prices, upper limit (in dollars per share)	$ 26.00
Options outstanding, shares (in shares) \| shares	72,667
Options outstanding, weighted average remaining contractual life (years)	6 years 3 months 7 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 23.02
Options exercisable, shares (in shares) \| shares	28,667
Options exercisable, weighted average exercise price (in dollars per share)	$ 22.90
$26.01-30.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit (in dollars per share)	26.01
Range of exercise prices, upper limit (in dollars per share)	$ 30.00
Options outstanding, shares (in shares) \| shares	19,750
Options outstanding, weighted average remaining contractual life (years)	2 years 7 months 17 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 28.15
Options exercisable, shares (in shares) \| shares	19,750
Options exercisable, weighted average exercise price (in dollars per share)	$ 28.15

Stock-Based and Other Long-Term Incentive Compensation - Schedule of Status of Unvested Stock Options (Details)	6 Months Ended
	Jun. 30, 2024 $ / shares shares
Shares
Unvested, beginning of period (in shares) \| shares	24,335
Granted (in shares) \| shares	44,000
Vested, outstanding shares (in shares) \| shares	(2,502)
Cancelled/Forfeited (in shares) \| shares	0
Unvested, end of period (in shares) \| shares	65,833
Weighted Average Grant Date Fair Value Per Share
Unvested, beginning of period (in dollars per share) \| $ / shares	$ 5.45
Granted (in dollars per share) \| $ / shares	12.46
Vested, outstanding shares (in dollars per share) \| $ / shares	6.57
Canceled/Forfeited (in dollars per share) \| $ / shares	0
Unvested, end of period (in dollars per share) \| $ / shares	$ 10.09

Stock-Based and Other Long-Term Incentive Compensation - Stock Option, Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation expense	$ 0.4		$ 0.4
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense (less than)	$ 0.1	$ 0.1	$ 0.1	$ 0.1

Stock-Based and Other Long-Term Incentive Compensation - Restricted Shares/Units, Narrative (Details) $ in Millions										3 Months Ended		6 Months Ended
	Jun. 13, 2024 independent_director shares	Mar. 14, 2024 shares	Mar. 04, 2024 shares	Jan. 29, 2024 shares	Oct. 26, 2023 shares	Oct. 08, 2023 shares	Jun. 30, 2023 shares	May 09, 2023 independent_director shares	Apr. 25, 2023 shares	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) shares	Jun. 30, 2023 USD ($)
Restricted Stock Units (RSUs) \| Chief Technical Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		21,984							27,840
Award vesting period		3 years							3 years
Restricted Stock Units (RSUs) \| Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)				31,382			10,101
Award vesting period				3 years
Restricted Stock Units (RSUs) \| Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	5,620				4,623			9,470
Award vesting period	1 year				1 year			1 year
Shares forfeited (in shares)								2,252
Number of shares to be transferred (in shares)								6,856
Vested (in shares)								362
Restricted Stock Units (RSUs) \| Director Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	5,620							9,470
Restricted Stock Units (RSUs) \| Director Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	5,620							9,470
Restricted Stock Units (RSUs) \| Director Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	5,620							9,470
Restricted Stock Units (RSUs) \| Chief Operating Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			11,293			6,361
Award vesting period			3 years			3 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)												83,294
Shares forfeited (in shares)												21,147
Vested (in shares)												52,505
Share-based compensation expense \| $										$ 0.2	$ 1.1	$ 0.4	$ 1.6
Restricted Stock \| Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)									58,790
Restricted Stock \| Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of independent directors \| independent_director	4							4
Common Stock \| Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)							10,101
Performance Shares \| Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)				2
Performance Shares \| Chief Operating Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			11,293
Performance Shares \| Chief Operating Officer And Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period												3 years
Performance Shares \| Chief Operating Officer And Chief Executive Officer \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage												0.00%
Performance Shares \| Chief Operating Officer And Chief Executive Officer \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage												200.00%
Performance Shares Signing Bonus \| Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)				6,494
Performance Shares, 2024 Pro-Rated \| Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)				31,382

Stock-Based and Other Long-Term Incentive Compensation - Schedule of Restricted Stock Activity (Details) - Restricted Stock - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Number of Shares
Outstanding, beginning of period (in shares)	133,898
Granted (in shares)	83,294
Vested (in shares)	(52,505)
Canceled/Forfeited (in shares)	(21,147)
Outstanding, ending of period (in shares)	143,540	133,898
Weighted Average Grant Date Fair Value
Outstanding beginning of period (in dollars per share)	$ 10.66
Granted (in dollars per share)	17.58
Vested (in dollars per share)	10.26
Canceled/Forfeited (in dollars per share)	11.12
Outstanding ending of the period (in dollars per share)	$ 14.82	$ 10.66
Weighted Average Remaining Contractual Life (years)
Weighted average remaining contractual life (years)	5 years 1 month 17 days	1 year 6 months 25 days
Aggregate Intrinsic Value (in thousands)
Outstanding, aggregate intrinsic value	$ 2,888	$ 1,813
Granted, aggregate intrinsic value	1,464
Vested, aggregate intrinsic value	1,149
Cancelled/Forfeited, aggregate intrinsic value	$ 235

Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Numerator:
Net income	$ 4,250	$ 5,098	$ 504	$ 370	$ 9,348	$ 874
Denominator for earnings per basic common share:
Weighted average common shares outstanding (in shares)	12,384		12,292		12,392	12,253
Denominator for earnings per diluted common share:
Weighted average common shares outstanding (in shares)	12,384		12,292		12,392	12,253
Dilutive effect of stock options and restricted stock/units (in shares)	99		102		92	121
Diluted weighted average shares (in shares)	12,483		12,394		12,484	12,374
Earnings per common share:
Basic (in dollars per share)	$ 0.34		$ 0.04		$ 0.75	$ 0.07
Diluted (in dollars per share)	$ 0.34		$ 0.04		$ 0.75	$ 0.07

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