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Summary of Significant Accounting Policies | 12 Months Ended
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Dec. 31, 2025
Accounting Policies [Abstract] |
Summary of Significant Accounting Policies | Summary of Significant Accounting Policies Organization and Principles of Consolidation. NPK International Inc. is a temporary worksite access solutions company that manufactures, sells, and rents recyclable composite matting products, along with a full suite of services, including planning, logistics, and site restoration. In 2025, 66% of our revenues were generated from the rental of our recyclable composite matting systems, along with related site construction and services to customers in various markets including power transmission, oil and natural gas exploration and production, pipeline, renewable energy, petrochemical, construction and other industries within the United States and United Kingdom. The remaining 34% of our 2025 revenues were generated from the sale of our manufactured recyclable composite mats, with power transmission being the primary end market. We previously operated a Fluids Systems business, which was historically reported as a separate operating segment. On September 13, 2024, we completed the sale of substantially all of the Company’s Fluids Systems segment (the “Sale Transaction”) to SCF Partners, a leading private equity firm serving the global energy industry (the “Purchaser”). The results of operations of Fluids Systems are reported in discontinued operations in the consolidated statements of operations. All results and information in the consolidated financial statements and related notes are presented for our continuing operations and exclude Fluids Systems unless otherwise noted specifically as discontinued operations. See Note 2 for additional information. When referring to NPK International Inc. (“NPK,” the “Company,” “we,” “our,” or “us”), the intent is to refer to NPK International Inc. and its subsidiaries as a whole. NPK International Inc., formerly known as Newpark Resources, Inc., was organized in 1932 as a Nevada corporation. In 1991, we changed our state of incorporation to Delaware. On December 9, 2024, we changed our name to NPK International Inc. The consolidated financial statements include our company and our wholly owned subsidiaries. All intercompany transactions are eliminated in consolidation. Use of Estimates and Market Risks. The preparation of financial statements in conformity with accounting principles generally accepted in the United States (“U.S. GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Significant estimates used in preparing our consolidated financial statements include, but are not limited to, the following: the fair values of assets acquired and liabilities assumed at the dates of acquisition for business combinations, estimated cash flows and fair values used for impairments of long-lived assets, including goodwill and other intangibles, and valuation allowances for deferred tax assets. Cash Equivalents. All highly liquid investments with a remaining maturity of three months or less at the date of acquisition are classified as cash equivalents. Restricted Cash. Cash that is restricted as to withdrawal or usage is recognized as restricted cash and is included in other current assets in the consolidated balance sheets. Allowance for Credit Losses. Trade receivables are presented at the net amount expected to be collected. We estimate the lifetime “expected credit loss” for such assets at inception, which generally results in the earlier recognition of allowances for losses. Our allowance for credit losses reflects losses that are expected over the contractual life of the asset, and takes into account historical loss experience, current and future economic conditions, and reasonable and supportable forecasts. Inventories. Inventories are stated at the lower of average cost or net realizable value. Certain conversion costs associated with our manufacturing operations are capitalized as a component of the carrying value of the inventory and expensed as a component of cost of revenues as the products are sold. Property, Plant and Equipment. Property, plant and equipment are recorded at cost. Additions and improvements that extend the useful life of an asset are capitalized. We capitalize interest costs on significant capital projects. Maintenance and repairs are expensed as incurred. Sales and disposals of property, plant and equipment are removed at carrying cost less accumulated depreciation with any resulting gain or loss reflected in earnings. Depreciation is provided on property, plant and equipment, including finance lease assets, primarily utilizing the straight-line method over the following estimated useful service lives or lease term:
Computer software, hardware, and office equipment |  | 3-5 years
Autos and light trucks |  | 5-7 years
Furniture, fixtures, and trailers |  | 7-10 years
Rental assets |  | 2-12 years
Machinery and heavy equipment |  | 5-15 years
Owned buildings |  | 20-39 years
Leasehold improvements | Lease term, including reasonably assured renewal periods
Cloud Computing Arrangements. Cloud computing arrangements that do not include a software license are accounted for as a service contract. For such cloud computing arrangements, we capitalize certain implementation costs in prepaid expenses and other current assets and other noncurrent assets in the consolidated balance sheets, and amortize these capitalized costs to selling, general and administrative expenses using the straight-line method over the fixed, non-cancellable term of the associated hosting arrangement, plus any reasonably certain renewal periods. Implementation costs for cloud computing arrangements are included in operating activities in the consolidated statements of cash flows. Leases. Leases are classified as either finance or operating at inception of the lease, with classification affecting the expense recognition in the income statement. Our leases have remaining terms ranging from 1 to 6 years with various extension and termination options. We consider these options in determining the lease term used to establish our operating lease assets and liabilities. Lease agreements with lease and non-lease components are accounted for as a single lease component. Leases with an initial term of 12 months or less are not recorded in the balance sheet and we recognize lease expense for these leases on a straight-line basis over the lease term. Certain leases require additional payments based on reimbursement for real estate taxes, common area maintenance, or various other variable lease payments. These variable lease payments are generally excluded from operating lease assets and lease liabilities and are recognized in rent expense as incurred. Sublease income is recognized on a straight-line basis over the expected lease term. For information regarding revenues from the rental of our matting systems, see Revenue Recognition below. Goodwill and Other Intangible Assets. Goodwill represents the excess of the purchase price of acquisitions over the fair value of the net identifiable assets acquired in business combinations. Goodwill is not amortized. Intangible assets with finite useful lives are amortized either on a straight-line basis over the asset’s estimated useful life or on a basis that reflects the pattern in which the economic benefits of the asset are realized. Any period costs of maintaining intangible assets are expensed as incurred. Impairment of Long-Lived Assets. Goodwill is tested for impairment annually as of November 1, or more frequently, if indicators of impairment exist. As part of our annual goodwill review, we first perform a qualitative assessment based on company performance and future business outlook to determine if indicators of impairment exist. When there are qualitative indicators of impairment, we use an impairment test which includes a comparison of the carrying value of net assets of our reporting unit, including goodwill, with its estimated fair value, which we estimate using a combination of a market multiple and discounted cash flow approach (classified within level 3 of the fair value hierarchy). If the carrying value exceeds the estimated fair value, an impairment charge is recorded in the period in which such review is performed. We review property, plant and equipment, finite-lived intangible assets and certain other assets for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. We assess recoverability based on the undiscounted future net cash flows expected from the use and eventual disposition of such asset. Should the review indicate that the carrying value is not fully recoverable, the amount of impairment loss is determined by comparing the carrying value to the estimated fair value. Insurance. We maintain reserves for estimated future payments associated with our self-insured employee healthcare programs, as well as the self-insured retention exposures under our general liability, auto liability, and workers compensation insurance policies. Our reserves are determined based on historical experience under these programs, including estimated development of known claims and estimated incurred-but-not-reported claims. Treasury Stock. Treasury stock is carried at cost, which includes the entire cost of the acquired stock. Revenue Recognition. We recognize revenues in accordance with two different accounting standards, leases and revenues from contracts with customers. Leases Owned equipment rentals are accounted for as operating leases with rental revenues recognized over the rental term. Revenues from any subsequent extensions to the rental agreements are recognized over the extension period. Rental revenues also include cross-rentals, in which we rent matting systems from vendors and then re-rent them to our customers, which are accounted for as subleases. Revenues from Contracts with Customers Service revenues are recognized when the specified services are performed. Services revenues include certain services performed that are directly related to mat rental operations. Such services include mat installation and removal, freight (hauling of mats), and direct labor related to such activities. Revenues from the direct sale of products are recognized when control passes to the customer, which is upon shipment or delivery, depending on the terms of the underlying sales contract. Revenues for rentals and services are generated from both fixed-price and unit-priced contracts, which are generally short term in duration. The activities under these contracts include the installation and rental of matting systems for a period of time and services such as access road construction, site planning and preparation, environmental protection, erosion control, and site restoration services. The amount of revenue we recognize for services performed and products sold reflects the consideration to which we expect to be entitled in exchange for such services or goods, which generally reflects the amount we have the right to invoice. While billing requirements vary, many of our customer contracts require that billings occur periodically or at the completion of specified activities, even though our performance and right to consideration occurs throughout the contract. As such, we recognize revenue as performance is completed in the amount to which we have the right to invoice. We do not disclose the value of our unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) contracts for which we recognize revenue for the amount to which we have the right to invoice for services performed and products sold. Shipping and handling costs are reflected in cost of revenues, and all reimbursements by customers of shipping and handling costs are included in revenues. Income Taxes. We provide for deferred taxes using an asset and liability approach by measuring deferred tax assets and liabilities due to temporary differences existing at year end using currently enacted tax rates and laws that will be in effect when the differences are expected to reverse. We reduce deferred tax assets by a valuation allowance when, based on our estimates, it is more likely than not that a portion of those assets will not be realized in a future period. The estimates utilized in recognition of deferred tax assets are subject to revision, either up or down, in future periods based on new facts or circumstances. We present deferred tax assets and liabilities as noncurrent in the balance sheet based on an analysis of each taxpaying component within a jurisdiction. We evaluate uncertain tax positions and record a reduction to the related net operating loss or a liability, as circumstances warrant. Share-Based Compensation. Share-based compensation cost is measured at the grant date based on the fair value of the award, net of an estimated forfeiture rate. We recognize these costs in the statement of operations using the straight-line method over the vesting term. Foreign Currency Translation. The functional currency for all international subsidiaries is their respective local currency. Financial statements for these international subsidiaries are translated into U.S. dollars using the exchange rate at each balance sheet date for assets and liabilities and the average exchange rates in effect during the respective period for revenues and expenses. Exchange rate adjustments resulting from translation of foreign currency financial statements of our international subsidiaries are reflected in accumulated other comprehensive loss in stockholders’ equity until such time that the international subsidiary is sold or liquidation is substantially complete, at which time the related accumulated adjustments would be reclassified into income. Exchange rate adjustments resulting from foreign currency denominated transactions are recorded in income. Following the Sale Transaction, our U.K. operations represent our primary foreign currency exposure, with British pounds serving as the functional currency for our U.K. subsidiaries. At December 31, 2025 and 2024, accumulated other comprehensive loss related to foreign subsidiaries reflected in stockholders’ equity was $1.6 million and $2.9 million, respectively. Fair Value Measurement. Fair value is measured as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at a measurement date. We apply the following fair value hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement: •Level 1: The use of quoted prices in active markets for identical financial instruments. •Level 2: The use of quoted prices for similar instruments in active markets or quoted prices for identical or similar instruments in markets that are not active or other inputs that are observable in the market or can be corroborated by observable market data. •Level 3: The use of significantly unobservable inputs that typically require the use of management’s estimates of assumptions that market participants would use in pricing. New Accounting Pronouncements Standards Adopted in 2025 Income Taxes: Improvements to Income Tax Disclosures. In December 2023, the FASB issued new guidance intended to enhance the transparency and decision usefulness of income tax disclosures. We adopted this guidance on a prospective basis in this Annual Report on Form 10-K. The new guidance had no impact on our consolidated financial position, results of operations, or cash flows, but did result in expanded income tax disclosures. See Note 9 for additional information. Standards Not Yet Adopted Disaggregation of Income Statement Expenses. In November 2024, the FASB issued new guidance which requires entities to disclose additional information about specific expense categories, such as employee compensation and depreciation. This guidance will be effective for us for years beginning after December 15, 2026, and interim periods beginning after December 15, 2027, with early adoption permitted on either a prospective or retrospective basis. We are currently evaluating the impact of the new guidance on our consolidated financial statements and related disclosures.

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- Definition The entire disclosure for the basis of presentation and significant accounting policies concepts. Basis of presentation describes the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). Accounting policies describe all significant accounting policies of the reporting entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483426/235-10-50-1 + Details
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