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Summary of Significant Accounting Policies | 12 Months Ended
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Sep. 30, 2025
Accounting Policies [Abstract] |
Summary of Significant Accounting Policies | Summary of Significant Accounting Policies Principles of Consolidation The consolidated financial statements include the accounts of Powell and our wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. Use of Estimates 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 amounts reported in the consolidated financial statements and accompanying footnotes. The most significant estimates used in our consolidated financial statements affect revenue recognition and estimated cost recognition on our customer contracts, allowance for credit losses, provision for excess and obsolete inventory, warranty accruals and income taxes. The amounts recorded for warranties, legal, income taxes, impairment of long-lived assets (when applicable), liquidated damages and other contingent liabilities require judgments regarding the amount of expenses that will ultimately be incurred. We base our estimates on historical experience, forecasts and various other assumptions, as well as the specific circumstances surrounding these contingent liabilities, in evaluating the amount of liability that should be recorded. Additionally, the basis for recognition of deferred tax assets requires estimates related to future income and other assumptions regarding timing and future profitability because the ultimate realization of net deferred tax assets is dependent on the generation of future taxable income during periods in which temporary differences become deductible. Estimates routinely change as new events occur, additional information becomes available or operating environments change. Actual results may differ from our prior estimates. Cash and Investments Cash and cash equivalents – Cash and cash equivalents, primarily funds held in money market savings instruments, are reported at their current carrying value, which approximates fair value due to the short-term nature of these instruments, and are included in cash and cash equivalents in our Consolidated Balance Sheets. Short-term investments – Short-term investments include time deposits with original maturities of three months or more. Supplemental Disclosures of Cash Flow Information (in thousands):
| Year Ended September 30,
| 2025 |  | 2024 |  | 2023
Cash paid (received) during the period for: |  |  |  |  |
Interest received, net of interest expense | $ | (14,542) |  |  | $ | (15,641) |  |  | $ | (5,465) |
Income taxes paid, net of refunds | 56,133 |  |  | 50,919 |  |  | 17,232 |
Non-cash capital expenditures | 186 |  |  | 361 |  |  | 183 |
Fair Value of Financial Instruments Financial instruments include cash, cash equivalents, short-term investments, receivables, deferred compensation, contingent future payments related to business acquisitions, payables and debt obligations. Except as described below, due to the short-term nature of account receivables and account payables, their book values are representative of their fair values. Accounts Receivable Accounts receivable are stated net of allowances for credit losses. We maintain and continually assess the adequacy of the allowance for credit losses representing our estimate for losses resulting from the inability of our customers to pay amounts due to us. This estimated allowance is based on historical experience of uncollected accounts, the level of past due accounts, the overall level of outstanding accounts receivable, information about specific customers with respect to their inability to make payments and expectations of future conditions that could impact the collectability of accounts receivable. Future changes in our customers’ operating performance and cash flows, or in general economic conditions, could have an impact on their ability to fully pay these amounts, which could have a material impact on our operating results. In most cases, receivables are not collateralized. However, we utilize letters of credit to secure payment on projects when possible. Retention amounts are in accordance with applicable provisions of contracts and become due upon completion of contractual requirements. As of September 30, 2025 and 2024, we had retention amounts of $8.1 million and $7.1 million, respectively. Of the retained amount at September 30, 2025, $8.0 million is expected to be collected in the next twelve months and is recorded in accounts receivable. The remaining $0.1 million is recorded in other assets and is expected to be collected beyond September 30, 2026. Contract Balances The timing of revenue recognition, billings and cash collections affects accounts receivable, contract assets and contract liabilities in our Consolidated Balance Sheets. Contract assets are recorded when revenues are recognized in excess of amounts billed for fixed-price contracts as determined by the billing milestone schedule. Contract assets are transferred to accounts receivable when billing milestones have been met, or we have an unconditional right to payment. Contract liabilities typically represent advance payments from contractual billing milestones and billings in excess of revenue recognized. It is unusual to have advanced milestone payments with a term greater than one year, which could represent a financing component on the contract. Our contract assets and liabilities are reported in a net position on a contract-by-contract basis at the end of each reporting period and are generally classified as current. Inventories Inventories are stated at the lower of cost or net realizable value using weighted-average methods and include the cost of materials, labor and manufacturing overhead. We use estimates in determining the level of reserves required to state inventory at the lower of cost or net realizable value. Our estimates are based on market activity levels, production requirements, the physical condition of products and technological innovation. Changes in any of these factors may result in adjustments to the carrying value of inventory. Property, Plant and Equipment Property, plant and equipment are stated at cost and are depreciated using the straight-line method over the estimated useful lives of the assets. Expenditures for repairs and maintenance are charged to expense when incurred. Expenditures for major renewals and improvements, which extend the useful lives of existing equipment, are capitalized and depreciated. Upon retirement or disposition of property, plant and equipment, the cost and related accumulated depreciation are removed from the accounts, and any resulting gain or loss is recognized in the Consolidated Statements of Operations. We review property, plant and equipment for impairment whenever events or changes in circumstances indicate that the carrying value may not be realizable. If an evaluation is required, the estimated future undiscounted cash flows associated with the asset are compared to the asset’s carrying amount to determine if recording an impairment of such asset is necessary. If an impairment is indicated, we record an impairment loss equal to the difference between the carrying value and the fair value of the long-lived asset. This requires us to make long-term forecasts of the future revenues and the costs related to the assets subject to review. Forecasts require assumptions about demand for our products and future market conditions. Estimating future cash flows requires significant judgment, and our projections may vary from cash flows eventually realized. Future events and unanticipated changes to assumptions could require a provision for impairment in a future period. The effect of any impairment would be reflected in operating income in the Consolidated Statements of Operations. In addition, we estimate the useful lives of our property, plant and equipment and periodically review these estimates to determine whether these lives are appropriate. Goodwill and Other Intangible Assets Goodwill and other intangible assets generally result from acquired businesses. We account for business acquisitions by allocating the purchase price to tangible and intangible assets acquired and liabilities assumed at their fair values at the acquisition date; the excess of the purchase price over the allocated amount is recorded as goodwill. Goodwill is not amortized, but is evaluated for impairment at least annually. An impairment exists when the carrying amount of goodwill exceeds its implied fair value. Additional impairment assessments may be performed on an interim basis if we encounter events or changes in circumstances that would indicate, more likely than not, the carrying value of goodwill has been impaired. In the evaluation of goodwill for impairment, we have the option to first perform a qualitative assessment to determine whether it is more likely than not that the fair value is less than its carrying value. If, after completing such assessment, we determine it is more likely than not that the fair value is greater than its carrying value, no further testing is required. If we conclude otherwise, or if we elect to perform a quantitative assessment, we then calculate the fair value and compare to the carrying value. In performing the fair value assessment, management makes various judgments, estimates and assumptions, the most significant of which include the estimated future cash flows and discount rates. If the carrying value exceeds the fair value, an impairment loss, not to exceed the carrying amount of goodwill, is recorded in the Consolidated Statements of Operations. Other intangible assets include customer relationships, trademarks, purchased technology and order backlog, all of which are subject to amortization over their estimated remaining useful lives. We evaluate other intangible assets for impairment when impairment indicators are present. If the carrying value exceeds the fair value, an impairment loss is recorded in the Consolidated Statements of Operations. In Fiscal 2025, we added $5.1 million of goodwill and $5.8 million of other finite-life intangible assets through the acquisition of Remsdaq Ltd. (Remsdaq). See Note P. Business Acquisition for additional information. Income Taxes We account for income taxes under the asset and liability method, based on the income tax laws and rates in the countries in which operations are conducted, and income is earned. This approach requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of temporary differences between the carrying amounts and the tax basis of assets and liabilities. Developing our provision for income taxes requires significant judgment and expertise in federal, international and state income tax laws, regulations and strategies, including the determination of deferred tax assets and liabilities and, if necessary, any valuation allowances that may be required for deferred tax assets. In assessing the extent to which net deferred tax assets may be realized, we consider whether it is more likely than not that some portion or all of the net deferred tax assets may not be realized. The ultimate realization of net deferred tax assets is dependent on the generation of future taxable income during the periods in which those temporary differences become deductible. Estimates may change as new events occur, estimates of future taxable income during the carryforward period are reduced or increased, additional information becomes available or operating environments change, which may result in a full or partial reversal of the valuation allowance. We will continue to assess the adequacy of the valuation allowance on a quarterly basis. Our judgments and tax strategies are subject to audit by various taxing authorities. The objectives of accounting for income taxes are to recognize the amount of taxes payable or refundable for the current year and deferred tax liabilities and assets for the future tax consequences of events that have been recognized in an entity’s financial statements or tax returns. We recognize the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the financial statements from such a position should be measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. Accounting literature also provides guidance on derecognition of income tax assets and liabilities, classification of current and deferred income tax assets and liabilities, accounting for interest and penalties associated with tax positions, and income tax disclosures. Judgment is required in assessing the future tax consequences of events that have been recognized in our financial statements or tax returns. Variations in the actual outcome of these future tax consequences could materially impact our financial statements. Revenue Recognition Our revenues are primarily generated from the manufacturing of custom-engineered products and systems under long-term, fixed-price contracts that may last from one month to several years, depending on the contract. Revenue from these contracts is generally recognized over time utilizing the cost-to-cost method. Under the cost-to-cost method, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation. We believe that this method is the most accurate representation of our performance because it directly measures the value of the services transferred to the customer over time as we incur costs on our contracts. Contract costs include all direct materials, labor and indirect costs related to contract performance, which may include indirect labor, supplies, tools, repairs and depreciation costs. We also have contracts to provide field service inspection, installation, commissioning, modification, and repair services, as well as retrofit and retrofill components for existing systems. If the service contract terms give us the right to invoice the customer for an amount that corresponds directly with the value of our performance completed to date (i.e., a service contract in which we bill a fixed amount for each hour of service provided), then we recognize revenue over time in each reporting period corresponding to the amount that we have the right to invoice. Our performance obligations are satisfied as the work progresses. We also have sales orders for spare parts and replacement circuit breakers for switchgear that are obsolete or that are no longer produced by the original manufacturer. Revenues from these sales orders are recognized at the time we fulfill our performance obligation to the customer, which is typically upon shipment. Additionally, some contracts may contain a cancellation clause that could limit the amount of revenue we are able to recognize over time. In these instances, revenue and costs associated with these contracts are deferred and recognized at a point in time when the performance obligation is fulfilled. Selling and administrative costs incurred in relation to obtaining a contract are typically expensed as incurred. We periodically utilize a third-party sales agent to obtain a contract and will pay a commission to that agent. We record the full commission liability to the third-party sales agents at the order date, with a corresponding deferred asset. As the project progresses, we record commission expense based on percentage of completion rates that correlate to the project and reduce the deferred asset. Once we have been paid by the customer, we pay the commission, and the liability is reduced. Warranty Costs Estimated costs of warranties are accrued based on historical warranty claim costs in relation to current revenues. In addition, specific provisions are made when product failures are projected outside historical experience. Our standard terms and conditions of sale include a warranty for parts and service for one year. Occasionally, we provide service-type warranties that will extend the warranty period. Actual results could differ from our estimate. Projects may require, on occasion, warranty terms that are longer than our standard terms due to the nature of the project. Extended warranty terms may be negotiated and included in our contracts. The allocated revenue associated with the extended warranty is deferred and recorded as a contract liability and recognized as revenue over the extended warranty period. Research and Development Expense Research and development activities are directed toward the development of new products and processes as well as improvements in existing products and processes. These costs, which primarily include salaries, contract services and supplies, are expensed as incurred. Such amounts were $11.0 million, $9.4 million and $6.2 million in Fiscal 2025, 2024 and 2023, respectively. Foreign Currency Translation The functional currency for our foreign subsidiaries is the local currency in which the entity is located. The financial statements of all subsidiaries with a functional currency other than the U.S. Dollar have been translated into U.S. Dollars. All assets and liabilities of foreign operations are translated into U.S. Dollars using period-end exchange rates, and all revenues and expenses are translated at average rates during the respective period. The U.S. Dollar results that arise from such translation, as well as exchange gains and losses on intercompany balances of a long-term investment nature, are included in the cumulative currency translation adjustments in accumulated other comprehensive loss in stockholders’ equity. Stock-Based Compensation We measure stock-based compensation cost at the grant date based on the fair value of the award. Compensation expense is recognized over the period during which the recipient is required to provide service in exchange for the awards, typically the vesting period. Excess income tax benefits related to stock-based compensation expense are recognized as income tax expense or benefit in the Consolidated Statements of Operations. Cash paid when directly withholding shares on an employee’s behalf for tax withholding purposes is classified as a financing activity. We account for forfeitures as they occur, rather than estimate expected forfeitures. Recently Adopted Accounting Standards Update In November 2023, the Financial Accounting Standard Board (FASB) issued Accounting Standards Update (ASU) 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which requires that public entities disclose significant segment expenses that are regularly provided to the chief operating decision maker (CODM) on an annual and interim basis. It also requires that public entities disclose the title and position of the CODM and an explanation of how the CODM uses the reported measures in assessing segment performance and resource allocation. Additionally, it requires that all existing annual disclosures about segment profit or loss and assets must be provided on an interim basis and clarifies that single reportable segment entities are subject to the disclosure requirement under Topic 280 in its entirety. ASU 2023-07 was effective for fiscal years beginning after December 15, 2023 and interim periods within those fiscal years beginning after December 15, 2024. A public entity should apply ASU 2023-07 retrospectively to all prior periods presented in the financial statements. Early adoption was permitted. We have adopted the new standard with an effective date of October 1, 2024. See Note N. Segment Information for additional information. Accounting Standards Updates and Disclosure Rules Issued but Not Yet Adopted In December 2023, the FASB issued ASU 2023-09, Improvements to Income Tax Disclosures, which enhances the transparency of income tax disclosures. It requires greater disaggregation of information in the tax rate reconciliation and income taxes paid disaggregated by jurisdiction. This ASU is effective for fiscal years beginning after December 15, 2024, and should be applied on a prospective basis. Retrospective application and early adoption are permitted. We are currently evaluating the impacts of the new standard. In November 2024, the FASB issued ASU No. 2024-03, Reporting Comprehensive Income - Expense Disaggregation Disclosures, which requires additional qualitative and quantitative information about specific expense categories in the notes to financial statements for both interim and annual reporting periods. In January 2025, the FASB further clarified the effective date for interim reporting periods. This ASU is effective for fiscal years beginning after December 15, 2026 and interim periods within those fiscal years beginning after December 15, 2027, with early adoption permitted. We are currently evaluating the impacts of the new standard.

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