Biggest changeReconciliation The following table calculates gross margin, the most directly comparable GAAP financial measure, and reconciles it to adjusted gross margin: Year Ended December 31, 2023 2022 (in thousands) Total revenue $ 121,167 $ 84,825 Costs of revenue, exclusive of depreciation and amortization (62,454) (46,357) Depreciation allocable to costs of revenue (25,856) (23,551) Gross margin 32,857 14,917 Depreciation allocable to costs of revenue 25,856 23,551 Adjusted gross margin $ 58,713 $ 38,468 Liquidity and Capital Resources Our working capital positions as of December 31, 2023 and 2022 were as follows: As of December 31, 2023 2022 (in thousands) Current Assets: Cash and cash equivalents $ 2,746 $ 3,372 Trade accounts receivable, net 39,186 14,668 Inventory, net 21,639 23,414 Federal income tax receivable 11,538 11,538 Prepaid expenses and other 1,162 1,155 Total current assets 76,271 54,147 Current Liabilities: Accounts payable 17,628 6,481 Accrued liabilities 15,085 23,918 Total current liabilities 32,713 30,399 Net working capital $ 43,558 $ 23,748 For the year ended December 31, 2023, we invested approximately $153.9 million in rental equipment, property and other equipment.
Biggest changeThe following table calculates our gross margin, the most directly comparable GAAP financial measure, and reconciles it to Adjusted gross margin with further detail by revenue classification for the periods presented: Year Ended December 31, 2024 2023 2022 Total revenue $ 156,742 $ 121,167 $ 84,825 Cost of revenue, exclusive of depreciation and amortization (68,756) (62,454) (46,357) Depreciation allocable to cost of revenues (30,813) (25,856) (23,551) Gross margin 57,173 32,857 14,917 Depreciation allocable to cost of revenues 30,813 25,856 23,551 Adjusted gross margin $ 87,986 $ 58,713 $ 38,468 Adjusted gross margin by revenue classification: Rental $ 87,333 $ 57,282 $ 36,715 Sales (290) 2 918 Aftermarket services 943 1,429 835 Total adjusted gross margin $ 87,986 $ 58,713 $ 38,468 28 Adjusted EBITDA “Adjusted EBITDA” is a non-GAAP financial measure that we define as net income (loss) before interest, taxes, depreciation and amortization, as well as an increase in inventory allowance, impairments, retirement of rental equipment, non-recurring restructuring charges including severance and non-cash equity-classified stock-based compensation expenses.
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 general, we expect our overall business activity and revenues to track the level of activity in the oil and 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.
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.
We typically experience a decline in demand during periods of low oil and 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.
However, management believes Adjusted EBITDA is useful to an investor in evaluating our operating performance because: 29 • it is widely used by investors in the energy industry to measure a company’s operating performance without regard to items excluded from the calculation of Adjusted EBITDA, which can vary substantially from company to company depending upon accounting methods and book value of assets, capital structure and the method by which assets were acquired, among other factors; • it helps investors to more meaningfully evaluate and compare the results of our operations from period to period by removing the impact of our capital structure and asset base from our operating structure; and • it is used by our management for various purposes, including as a measure of operating performance, in presentations to our Board of Directors, as a basis for strategic planning and forecasting, and as a component for setting incentive compensation.
However, management believes Adjusted EBITDA is useful to an investor in evaluating our operating performance because: • it is widely used by investors in the energy industry to measure a company’s operating performance without regard to items excluded from the calculation of Adjusted EBITDA, which can vary substantially from company to company depending upon accounting methods and book value of assets, capital structure and the method by which assets were acquired, among other factors; • it helps investors to more meaningfully evaluate and compare the results of our operations from period to period by removing the impact of our capital structure and asset base from our operating structure; and • it is used by our management for various purposes, including as a measure of operating performance, in presentations to our Board of Directors, as a basis for strategic planning and forecasting, and as a component for setting incentive compensation.
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.
As demand and prices increase, oil and 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.
Adjusted gross margin has certain material limitations associated with its use as compared to gross margin. These limitations are primarily due to the exclusion of depreciation expense, which is material to our results of operations. Because we use capital assets, depreciation expense is a necessary element of our costs and our ability to generate revenue.
Adjusted gross margin has certain material limitations associated with its use as compared to gross margin. These limitations are primarily due to the exclusion of depreciation and amortization expense, which is material to our results of operations. Because we use capital assets, depreciation and amortization expense is a necessary element of our costs and our ability to generate revenue.
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 on acceptable terms.
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 and might not be available to us when we need it, or might not be on acceptable terms.
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.
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 gas producers and higher levels of production.
To the extent we establish a valuation allowance or increase this allowance in a period, we must include an expense in the tax provision in the statement of income. Significant management judgment is required in determining our provision for income taxes, our deferred tax assets and liabilities and any valuation allowance recorded against our net deferred tax assets.
To the extent we establish a valuation allowance or increase this allowance during a period, we must include an expense in the tax provision in the Statement of Operations. Significant management judgment is required in determining our provision for income taxes, our deferred tax assets and liabilities and any valuation allowance recorded against our net deferred tax assets.
We recognized this need in recent years and have shifted our cash and fabrication resources 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 recognized this need in recent years and have shifted our cash and fabrication resources towards 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 service provider.
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.
With this shift towards oil production the demand for overall compression services and products is driven by two general factors; (i) an increased focus by producers on artificial lift applications, e.g., production enhancement with compression assisted gas lift; 26 and (ii) declining reservoir pressure in maturing natural gas producing fields, especially non-conventional production.
The level of production for oil activity and capital expenditures has generally been dependent upon the prevailing view of future gas and oil prices, which are influenced by numerous supply and demand factors, including availability and cost of capital, well productivity and development costs, global and domestic economic conditions, environmental regulations, policies of OPEC countries and Russia, and other factors.
The level of production for crude oil activity and capital expenditures has generally been dependent upon the prevailing view of future crude oil prices, which are influenced by numerous supply and demand factors, including availability and cost of capital, well productivity and development costs, global and domestic economic conditions, environmental regulations, policies of OPEC and Russia, and other factors.
Depreciation expense does not accurately reflect the costs required to maintain and replenish the operational usage of our assets and therefore may not portray the costs from current operating activity. Rather, depreciation expense reflects the systematic allocation of historical property and equipment values over the estimated useful lives.
Depreciation and amortization expense does not accurately reflect the costs required to maintain and replenish the operational usage of our assets and therefore may not portray the costs from current operating activity. Rather, depreciation and amortization expense reflects the systematic allocation of historical property and equipment costs over their estimated useful lives.
The following factors could trigger an impairment review: significant underperformance relative to historical or projected future cash flows; significant adverse changes in the extent or manner in which asset (or asset group) is being used or its condition, including a meaningful drop in fleet utilization over the prior four quarters; significant negative industry or company-specific trends or actions, including meaningful capital expenditure budget reductions by our major customers or other sizable exploration and production or midstream companies, as well as significant declines in oil and natural gas prices; legislative changes prohibiting us from leasing our units; or poor general economic conditions.
The following factors could trigger an impairment review: significant underperformance relative to historical or projected future cash flows; significant adverse changes in the extent or manner in which an asset (or asset group) is being used or its condition, including a meaningful decline in fleet utilization over prior periods; significant negative industry or company-specific trends or actions, including meaningful capital expenditure budget reductions by our major customers or other sizable exploration and production or midstream organizations, as well as significant declines in oil and natural gas prices; legislative changes prohibiting us from leasing our units; or poor general economic conditions.
Please read the table below under “Reconciliation” to see how Adjusted EBITDA reconciles to our net income, the most directly comparable GAAP financial measure.
Please read the table below to see how Adjusted EBITDA reconciles to our net income (loss), the most directly comparable GAAP financial measure.
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.
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 GAAP.
This process involves us estimating our actual current tax exposure together with assessing temporary differences resulting from differing treatment of items for tax and accounting 26 purposes. These differences result in deferred tax assets and liabilities, which are included in our consolidated balance sheet.
This process involves us estimating our actual current tax exposure together with assessing temporary differences resulting from differing treatment of items for income tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are reflected on our Consolidated Balance Sheets.
We regularly review inventory quantities on hand and record a provision for excess and obsolete inventory based primarily on current and anticipated customer demand and production requirements.
We regularly review inventory quantities on hand and record an allowance for excess and obsolete inventory based primarily on current and anticipated customer demand and production requirements.
We believe adjusted gross margin is important because it focuses on the current operating performance of our operations and excludes the impact of the prior historical costs of the assets acquired or constructed that are utilized in those 30 operations.
Adjusted gross margin differs from gross margin, in that gross margin includes depreciation and amortization expense. We believe Adjusted gross margin is important because it focuses on the current operating performance of our operations and excludes the impact of the prior historical costs of the assets acquired or constructed that are utilized in those operations.
Accounting for Income Taxes As part of the process of preparing our financial statements, we are required to estimate our federal income taxes as well as income taxes in each of the states in which we operate.
Income Taxes In connection with the process of preparing our financial statements, we are required to estimate our federal income taxes as well as income taxes in each of the states in which we operate.
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.
The oil and 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 gas and the corresponding changes in commodity prices.
Adjusted gross margin is included as a supplemental disclosure because it is a primary measure used by our management as it represents the results of revenue and costs (excluding depreciation and amortization expense), which are key components of our operations. Adjusted gross margin differs from gross margin, in that gross margin includes depreciation expense.
Adjusted Gross Margin We define “Adjusted Gross Margin” as total revenue less costs of revenues (excluding depreciation and amortization expense). Adjusted gross margin is included as a supplemental disclosure because it is a primary measure used by our management as it represents the results of revenue and costs (excluding depreciation and amortization expense), which are key components of our operations.
We believe that the following discussion addresses our most critical accounting policies, which are those that are most important to the portrayal of our financial condition and results of operations and require our most difficult, subjective, and complex judgments, often as a result of the need to make estimates about the effect of matters that are inherently uncertain.
We believe that the following discussion addresses our most critical accounting estimates, which are those that are most important to the portrayal of our results of operations, financial condition and cash flows and require our most difficult, subjective, and complex judgments, often as a result of the need to make estimates about the effect of matters that are inherently uncertain. 38 Inventories We value our total inventory (current and long-term) at the lower of the actual cost and net realizable value.
Our Performance Trends and Outlook The market for compression equipment and services is highly dependent on the production levels of oil and natural gas.
The market for compression equipment and services is highly dependent on the production levels and pricing of oil and gas. Crude Oil .
Sales are subject to fluctuations in the timing of industry activity related to capital projects and, as such, can vary substantially between periods. Company management routinely reviews its inventory for obsolescence.
Sales are subject to fluctuations in the timing of industry activity related to our customers’ capital projects and, as such, can vary substantially between periods.
The obligations under the Credit Agreement are 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.
The obligations under the Credit Facility are secured by a first priority lien on most of our assets, including inventory and certain accounts receivable as well as a variable number of our leased compressor units. The maturity date of the Credit Facility is February 28, 2028.
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 is May 11, 2026.
We also have a right to request from the Lender, an increase to the potential aggregate commitment of up to $50.0 million; provided, however, the aggregate commitment amount is not permitted to exceed $350.0 million.
These contracts may also include a fee for servicing the compressor or flare during the rental contract. Our rental contracts typically range from six to 60 months, with our larger horsepower compressors having longer minimum contract terms. Our rental revenue is recognized over time, with equal monthly payments over the term of the contract.
These contracts, which all qualify as operating leases under GAAP, may also include a fee for servicing the compressor unit 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.
Generally, we feel 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, assuming prudent use of leverage.
Generally, we feel 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.
We assess the impairment of rental equipment and property and equipment whenever events or changes in circumstances indicate that the net recorded amount may not be recoverable.
Impairments We assess our long-lived assets, including rental equipment, other property and equipment and intangible assets for impairment whenever events or changes in circumstances indicate that the net carrying values may not be recoverable.
An impairment loss is recognized if the future undiscounted cash flows associated with the asset (or asset group) and the estimated fair value of the asset are less than the asset's carrying value. Inventories We value our total inventory (current and long-term) at the lower of the actual cost and net realizable value of the inventory.
After the assessments of such circumstances, an impairment loss is recognized if the future undiscounted net cash flows associated with the asset (or asset group) and the estimated fair value of the asset are less than the asset’s (or asset group’s) carrying value.
Reconciliation The following table reconciles our net income (loss), the most directly comparable GAAP financial measure, to Adjusted EBITDA: Year Ended December 31, 2023 2022 (in thousands) Net income (loss) $ 4,747 $ (569) Interest expense 4,082 364 Income tax expense 1,873 528 Depreciation and amortization 26,550 24,116 Impairment expense 779 — Inventory allowance 3,965 83 Retirement of rental equipment 505 196 Severance expenses 1,224 2,537 Stock compensation expense 2,054 1,910 Adjusted EBITDA $ 45,779 $ 29,165 Our definition and use of Adjusted Gross Margin We define “Adjusted Gross Margin” as total revenue less costs of revenues (excluding depreciation and amortization expense).
The following table reconciles our net income (loss), the most directly comparable GAAP financial measure, to Adjusted EBITDA for the periods presented: Year Ended December 31, 2024 2023 2022 Net income (loss) $ 17,227 $ 4,747 $ (569) Interest expense 11,927 4,082 364 Income tax expense 4,439 1,873 528 Depreciation and amortization 31,347 26,550 24,116 Impairments 841 779 — Inventory allowance 1,863 3,965 83 Retirement of rental equipment 28 505 196 Severance and restructuring charges 33 1,224 2,537 Stock-based compensation 1,821 2,054 1,910 Adjusted EBITDA $ 69,526 $ 45,779 $ 29,165 29 Results of Operations Year Ended December 31, 2024 Compared to the Year Ended December 31, 2023 Rentals We generate revenue from renting compressors to our customers.
Margins, exclusive of depreciation and amortization, for our rental business have historically run in the mid-40% to low-60% range, while margins for the compressor sales business tend to be in the mid-20% range. The oil and natural gas equipment rental and services industry is cyclical in nature.
State of the Industry and Outlook Our strategy for growth is focused on our compressor rental business. Gross margins, exclusive of depreciation and amortization, for our rental business have historically been in the mid-40 percent to low-60 percent range, while margins for the compressor sales business tend to be substantially lower.
On February 28, 2023, we replaced our Credit Agreement by entered into a five-year senior secured revolving credit agreement (“Amended and Restated Credit Agreement”) with Texas Capital Bank, as administrative agent (the “Lender”), 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.
We have a five-year senior secured revolving credit agreement, as amended, or the Credit Facility, with Texas Capital Bank, National Association (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 a total commitment of $300.0 million.
The Company accesses anticipated customer demand based on current and upcoming capital expenditure budgets of its major customers as well as other significant companies in the industry, along with oil and natural gas price forecasts and other factors affecting the industry. For the year ended December 31, 2023, our provision for excess and obsolete inventory totaled $4.0 million.
We assess anticipated customer demand based on current and upcoming capital expenditure budgets of our major customers as well as other significant participants in the industry, along with oil and gas price forecasts and other factors affecting the industry as a whole.
While oil prices have historically been volatile, we expect demand for our existing compressor fleet to remain positive assuming oil prices remain in reasonable bands around current pricing levels.
We feel that the current crude oil market production outlook is favorable, with current prices creating strong incentives for our customers to maximize their production levels. While crude oil prices have historically been volatile, we expect demand for our existing compressor fleet to remain positive assuming crude oil prices remain within reasonable bands with respect to current pricing levels.
We ended 2023 with an inventory allowance balance of $4.0 million. Company management also routinely reviews its rental fleet to determine which units are no longer of the type, configuration, make or model that our customers are demanding or that are not cost efficient to refurbish, maintain and/or operate.
Please see Note 4 ( “ Inventory ” ) to our Consolidated Financial Statements for additional information regarding the inventory allowance. 33 Retirement of Rental Equipment We routinely review the rental fleet to determine which units are no longer of the type, configuration, make or model that our customers are demanding or that are not cost efficient to refurbish, maintain and/or operate.
Components of Our Principal Capital Expenditures Capital expenditures for the years ended December 31: Expenditure Category 2023 2022 (in thousands) Rental equipment and property and equipment $ 153,943 $ 65,122 The level of our capital expenditures will vary in future periods depending on energy market conditions and other related economic factors.
The level of our capital expenditures will vary in future periods depending on energy market conditions and other related economic factors.
During the year, we added $152.5 million in new equipment to our rental fleet and $1.4 million in other property and equipment. Our investment in rental equipment includes any changes to work-in-progress related to our rental fleet jobs at the beginning of the year compared to the end of the year.
Our investment in rental equipment includes any changes to work-in-progress related to our rental fleet projects at the beginning of the year compared to the end of the year. Our rental work-in-progress increased by $0.8 million and $13.8 million during 2024 and 2023, respectively. We paid $0.2 million and $0.4 million for COLI policy purchases during 2024 and 2023.
ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS The following discussion is intended to assist you in understanding our financial position and results of operations for each of the years ended December 31, 2023 and 2022. You should read the following discussion and analysis in conjunction with our audited financial statements and the related notes.
MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS The discussion and analysis of our financial condition and results of operations for each of the years ended December 31, 2024 and 2023 are based on, and should be read in conjunction with, our audited Consolidated Financial Statements and the related notes included elsewhere in this 2024 Annual Report on Form 10-K.
Our rental equipment has estimated useful lives between 15 to 25 years, while our property and equipment has estimated useful lives which range from 3 to 39 years. The majority of our property and equipment, including rental equipment, is a direct cost to generating revenue.
Long-Lived Assets Depreciation Depreciation expense is computed using the straight-line method over the estimated useful lives of the underlying long-lived assets. Our rental equipment has estimated useful lives ranging from 15 to 25 years, while our property and equipment has estimated useful lives which range from 3 to 39 years.
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 25 principles generally accepted in the United States. Actual results could differ significantly from those estimates under different assumptions and conditions.
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 Consolidated Financial Statements. We evaluate our estimates and assumptions on an ongoing basis.
We continue to maintain new unit compressor fabrication capability at our Tulsa, Oklahoma facility as well as having relationships with multiple outsourced compressor fabrication providers. We also manufacture a line of compressor frames, cylinders and parts, known as our CiP (Cylinder-in-Plane) product line.
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 new unit compressor fabrication capability at our Tulsa, Oklahoma facility as well as having relationships with multiple outsourced compressor fabrication providers.
Some fabrication 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.
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.
As a result of this review, we determined 95 units should be retired from our rental fleet. Accordingly, we recorded a $0.5 million loss on retirement of rental equipment during the year ended December 31, 2023. Operating income increased to $10.5 million for the year ended December 31, 2023, compared to $0.4 million for the year ended December 31, 2022.
The following table indicates the charges incurred for the retirement of rental equipment for the periods presented: Year Ended December 31, 2024 2023 Change % Change Retirement of rental equipment $ 28 $ 505 $ (477) NM Retirements of compressor units during 2024 were minimal as compared to 2023 during which time we determined 95 units should be retired from our rental fleet for which we recorded loss on retirement of rental equipment during the year.
We describe our significant accounting policies more fully in Note 2 ("Summary of Significant Accounting Policies") to our consolidated financial statements. Our critical accounting policies are as follows: • revenue recognition; • provision for credit losses; • accounting for income taxes; • accounting for long-lived assets; and • accounting for inventory.
Critical Accounting Estimates We describe our significant accounting policies in Note 2 ( “ Summary of Significant Accounting Policies ” ) to our Consolidated Financial Statements.
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.
Based upon existing economic and market conditions, we believe that cash on hand, cash flows from operating activities and borrowings under the Credit Facility will be sufficient to satisfy our capital and liquidity requirements for at least the twelve months subsequent to the date that this Annual Report on Form 10-K was filed.
The increase is the result of new units added to our rental fleet in 2023. We added 92 units (approximately 98,349 horsepower) to our fleet during the twelve-month period ended December 31, 2023. Seventy-three of those units were 400 horsepower or larger, representing approximately 96% of the horsepower added.
The increase is primarily the result of new units added to our rental fleet in 2024 and 2023. We placed into service 22 high horsepower units (approximately 28,740 horsepower) to our fleet in 2024 and 92 units (approximately 98,349 horsepower) in 2023.
Off-Balance Sheet Arrangements From time-to-time, we enter into off-balance sheet arrangements and transactions that can give rise to off-balance sheet obligations. As of December 31, 2023, we did not have any material off-balance sheet arrangements. Recently Issued Accounting Pronouncements In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (ASC Topic 326): Measurement of Credit Losses on Financial Instruments.
Please see Note 1 1 ( “ Income Taxes ”) for a more thorough discussion of our income taxes. 39 Off-Balance Sheet Arrangements From time-to-time, we enter into off-balance sheet arrangements and transactions that can give rise to off-balance sheet obligations. As of December 31, 2024, we did not have any material off-balance sheet arrangements.
Based upon existing economic and market conditions, we believe that our cash on hand, operating cash flow and available line of credit are adequate to fully fund our net capital expenditures requirements for 2024. We also believe we have flexibility with respect to our financing alternatives and adjustments to our capital expenditure plans if circumstances warrant.
We also believe we have flexibility with respect to our financing alternatives and adjustments to our capital expenditure plans if circumstances warrant. We do not have any material continuing commitments related to our current operations that cannot be met with our cash on hand, cash from operating activities and borrowings under our Credit Facility.
Due to the slow-moving nature, obsolescence of a portion of the Company's long-term inventory, inventory related to the retirement of certain rental equipment and management's decision to cease further fabrication at our Midland fabrication facility, we recorded an increase of $4.0 million in the inventory allowance reserve to reduce the carrying amount of inventory items where we feel there is reduced future demand for certain items.
The following table indicates the charges incurred for inventory allowance for the periods presented: Year Ended December 31, 2024 2023 Change % Change Inventory allowance $ 1,863 $ 3,965 $ (2,102) (53.0) % Due primarily to the slow-moving nature, obsolescence of a portion of our long-term inventory and inventory related to the retirement of certain rental equipment, we recorded an increase of $1.9 million to the inventory allowance reserve for the year ended December 31, 2024.
As of December 31, 2023, we had $164 million outstanding under our Amended and Restated Credit Agreement with a weighted average interest rate of 9.40%, and we were in compliance with all financial covenants in our Amended and Restated Credit Agreement.
As of December 31, 2024, we had approximately $130.0 million available for borrowing under the Credit Facility, subject to borrowing base determination. As of December 31, 2024, we were in compliance with all financial covenants in our Credit Facility.
Our income tax expense in 2023 was largely due to certain executive severance compensation expenses incurred during 2023 that are non-deductible for income tax purposes. As such, we recognized income tax expense of $1.9 million while incurring net income before income taxes of $6.6 million for the year ended December 31, 2023.
Our effective tax rate for both years differs from the U.S. federal statutory rate of 21%. The effective tax rate declined during 2024 from that during 2023 largely due to certain executive severance compensation expenses incurred during 2023 that were non-deductible for income tax purposes.
After the terms of the contract have expired, a customer may renew their contract or continue renting on a monthly basis thereafter. Our rental business follows ASC 842 for revenue recognition. 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.
After the terms of the contract have expired, a customer may renew its contract or continue renting on a monthly basis thereafter.