Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Debt Covenant Period [Axis] Debt Covenant Period [Axis] Debt Covenant Period Statistical Measurement [Domain] Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Document Fiscal Year Focus Document Fiscal Year Focus Timing of satisfaction, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Employee retention credit refund Proceeds From Employee Retention Credit Refund Proceeds From Employee Retention Credit Refund Adjustment to Compensation, Amount Adjustment to Compensation Amount Customer [Axis] Customer [Axis] Segment Reporting [Abstract] Common shares, par value $1 per share, authorized 10,000 shares; issued and outstanding shares 6,254 at June 30, 2026 and 6,180 at September 30, 2025 Common Stock, Value, Issued Decrease to (income) expense, net Government Assistance, Other (Income) Expense, Increase (Decrease) Government Assistance, Other (Income) Expense, Increase (Decrease) Interest expense, net Disposal Group, Including Discontinued Operation, Interest Expense Schedule of Debt Schedule of Long-Term Debt Instruments [Table Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Retirement Benefit Plans Retirement Benefits [Text Block] Transferred over Time Transferred over Time [Member] Revolving credit agreement Line of Credit [Member] Restatement Determination Date Restatement Determination Date Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Inventory valuation accounts Inventory Write-down Total debt Long-Term Debt and Lease Obligation, Including Current Maturities Additional revenue recognized over-time Contract With Customer, Asset, Additional Revenue Recognized Contract With Customer, Asset, Additional Revenue Recognized Debt instrument, collateral fee installment amount Debt Instrument, Collateral Fee Installment Amount Debt Instrument, Collateral Fee Installment Amount Proceeds from sale of business Proceeds from Divestiture of Businesses Repayments of promissory note and related fees — related party Repayments of Related Party Debt Proceeds from disposal of operating assets Proceeds from Sale of Productive Assets Amendment Flag Amendment Flag Current liabilities: Liabilities, Current [Abstract] Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Principal payments on capital lease obligations Finance Lease, Principal Payments Net cash provided by discontinued operations Net Cash Provided by (Used in) Discontinued Operations Including Effect Of Exchange Rate Changes Net Cash Provided by (Used in) Discontinued Operations Including Effect Of Exchange Rate Changes Disposal Group Classification [Axis] Disposal Group Classification [Axis] Share transactions under equity-based plans Shares Issued, Value, Share-Based Payment Arrangement, After Forfeiture, Net Shares Issued, Value, Share-Based Payment Arrangement, After Forfeiture, Net Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] ED Loan ED Loan [Member] ED Loan Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Entity Address, State or Province Entity Address, State or Province PEO Total Compensation Amount PEO Total Compensation Amount Common shares, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Debt Covenant Period [Domain] Debt Covenant Period [Domain] Debt Covenant Period [Domain] Weighted-average number of common shares (basic) (in shares) Weighted-average common shares outstanding (basic) (in shares) Weighted Average Number of Shares Outstanding, Basic Tranche One Share-Based Payment Arrangement, Tranche One [Member] Contract assets Contract assets — beginning balance Contract assets — ending balance Contract with Customer, Asset, after Allowance for Credit Loss, Current Retirement Benefits [Abstract] Retirement Benefits [Abstract] Inventory valuation allowances Inventory Valuation Reserves Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Total current liabilities Liabilities, Current Net cash used for investing activities Cash Provided by (Used in) Investing Activity, Continuing Operation Performance obligations satisfied Contract with Customer, Liability, Including New Contract Revenue, Recognized Contract with Customer, Liability, Including New Contract Revenue, Recognized Concentration Risk [Table] Concentration Risk [Table] LIFO effect Inventory, LIFO Reserve, Period Charge Entity Address, City or Town Entity Address, City or Town Shares granted in period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Weighted average interest rate, revolving credit facility Line of Credit Facility, Interest Rate at Period End Revenue from Contract with Customer Revenue from Contract with Customer Benchmark [Member] Compensating balances held Compensating Balance, Amount Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Revolving credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Military revenue Military Revenue [Member] Military Revenue [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Debt Instrument [Table] Schedule of Long-Term Debt Instruments [Table] Net cash provided by (used for) operating activities Cash Provided by (Used in) Operating Activity, Continuing Operation Expense Government Assistance, Expense, Decrease (Increase) Recent Accounting Standards Adopted and Impact of Newly Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Net Earnings (Loss) per Share Earnings Per Share, Policy [Policy Text Block] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Additions to property, plant & equipment — incurred but not yet paid Capital Expenditures Incurred but Not yet Paid Contract liabilities Increase (Decrease) in Contract with Customer, Liability Grantee Status [Axis] Grantee Status [Axis] Schedule of Segment Assets at a Different Asset Level Segment Reporting [Table Text Block] Share purchase agreement, percentage to be acquired Disposal Group, Including Discontinued Operation, Percentage Divested Disposal Group, Including Discontinued Operation, Percentage Divested Unsecured Debt Unsecured Debt [Member] Revenue Revenue from Contract with Customer [Policy Text Block] Repayments of revolving credit agreement Repayments of Lines of Credit Accrued income tax Increase (Decrease) in Income Taxes Payable Document Period End Date Document Period End Date Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Rotorcraft Rotocraft Revenue [Member] Rotocraft Revenue [Member] Preferred shares, shares outstanding (in shares) Preferred Stock, Shares Outstanding Face amount Debt Instrument, Face Amount Contract assets Increase (Decrease) in Contract with Customer, Asset Basic earnings (loss) per share: Net earnings (loss) per share – basic: Earnings Per Share, Basic [Abstract] Security Exchange Name Security Exchange Name Debt instrument, maturity term Debt Instrument, Term Number Of Reportable Segments Not Disclosed Flag Number Of Reportable Segments Not Disclosed Flag Number Of Reportable Segments Not Disclosed Flag Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Less amounts billed to the customers Contract With Customer, Asset, Amounts Billed To Customers Contract With Customer, Asset, Amounts Billed To Customers Short-term operating lease liabilities Operating Lease, Liability, Current Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Cash flows from discontinued operations: Cash Provided by (Used in) Discontinued Operation [Abstract] Name Outstanding Recovery, Individual Name Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Receivables Increase (Decrease) in Accounts and Notes Receivable Trading Symbol Trading Symbol Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Current maturities of long-term debt, net of unamortized debt issuance costs Other Long-Term Debt, Current Company Selected Measure Name Company Selected Measure Name Number of awards granted Number of Awards Granted Number of Awards Granted Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Effect of dilutive securities: Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract] Concentration Risk [Line Items] Concentration Risk [Line Items] Non-cash investing activities: Noncash Investing and Financing Items [Abstract] Diluted earnings (loss) per share: Net earnings (loss) per share – diluted: Earnings Per Share, Diluted [Abstract] Retirement plan liability adjustment, net of tax Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Long-term debt, gross Long-Term Debt, Gross Percentage of excess assets Translation Adjustment Functional to Reporting Currency, Percentage of Excess Assets Translation Adjustment Functional to Reporting Currency, Percentage of Excess Assets Credit Facility [Domain] Credit Facility [Domain] Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Share transactions under company stock plan, net Share Transactions Under Company Stock Plan The aggregate amount of noncash, equity-based employee, officer and director remuneration. This may include the value of stock or unit options, amortization of restricted stock or units. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. Individual: Individual [Axis] Weighted-average number of common shares (diluted) (in shares) Weighted-average common shares outstanding diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Disposal Group Name [Domain] Disposal Group Name [Domain] Line of Credit Facility [Table] Line of Credit Facility [Table] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Other Other Comprehensive Income, Other, Net of Tax Proceeds from revolving credit agreement Proceeds from Lines of Credit Property, plant and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Schedule of Operating Discontinued Operations Disposal Groups, Including Discontinued Operations [Table Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Revolver Short-Term Debt 2016 Plan Two Thousand And Sixteen Long Term Incentive Plan [Member] Two thousand and Sixteen long-term incentive plan. Gross profit Gross Profit Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Award Timing Predetermined Award Timing Predetermined [Flag] Restricted cash Restricted Cash, Current Letters of credit Letters of Credit Outstanding, Amount Net cash used for operating activities Cash Provided by (Used in) Operating Activity, Discontinued Operation Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Effects of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Discontinued Operation Effective tax rate, percent Effective Income Tax Rate Reconciliation, Percent Interest income Government Assistance, Interest Income, Increase (Decrease) Government Assistance, Interest Income, Increase (Decrease) Grantee Status [Domain] Grantee Status [Domain] Restricted and performance shares (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements All Executive Categories All Executive Categories [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Schedule of Components of Net Periodic Benefit Cost Schedule of Net Benefit Costs [Table Text Block] Vesting [Domain] Vesting [Domain] Plan Name [Domain] Plan Name [Domain] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Operating lease right-of-use assets, net Operating Lease, Right-of-Use Asset Concentration Risk Type [Domain] Concentration Risk Type [Domain] Energy components for power generation units Energy Components For Power Generation Units [Member] Energy Components For Power Generation Units [Member] Schedule of Dilutive Effect Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Less — current maturities Long-Term Debt and Lease Obligation, Current Segment Information Segment Reporting [Text Block] Minimum Minimum [Member] Expiration Date Trading Arrangement Expiration Date Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Diluted earnings (loss) per share from continuing operations (in dollars per share) Continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Diluted Share Basic earnings (loss) per share from continuing operations (in dollars per share) Continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Disposal Group, Including Discontinued Operations [Line Items] Disposal Group, Including Discontinued Operations [Line Items] Net periodic pension cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Common shares, shares authorized (in shares) Common Stock, Shares Authorized Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Exercise Price Award Exercise Price Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Segment Reporting [Line Items] Segment Reporting [Line Items] Document Quarterly Report Document Quarterly Report Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments [Domain] Segments [Domain] Cash, cash equivalents and restricted cash at the beginning of the period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Disposal Group Classification [Domain] Disposal Group Classification [Domain] Debt instrument, unamortized discount premium Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Secured Debt Secured Debt [Member] Deferred income taxes Deferred Other Tax Expense (Benefit) Government Assistance, Type [Axis] Government Assistance, Type [Axis] Adoption Date Trading Arrangement Adoption Date Interest rate, fixed percentage Debt Instrument, Interest Rate, Stated Percentage Total shareholders’ equity Beginning balance Ending balance Total accumulated other comprehensive income Equity, Attributable to Parent Unamortized deferred financing costs written off Deferred Debt Issuance Cost, Writeoff Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Discontinued Operation Revenue recognized Contract With Customer, Liability, Revenue Recognized Including Opening Balance Contract With Customer, Liability, Revenue Recognized Including Opening Balance Change In Contract With Customer, Assets [Roll Forward] Change In Contract With Customer, Assets [Roll Forward] Change In Contract With Customer, Assets [Roll Forward] ASSETS Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Closing fee Debt Instrument, Fee Amount Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Enterprise value Disposal Group, Including Discontinued Operation, Enterprise Value Disposal Group, Including Discontinued Operation, Enterprise Value Insider Trading Policies and Procedures [Line Items] Finance lease obligations Finance Lease, Liability Credit losses Accounts Receivable, Allowance for Credit Loss, Current Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Performance shares Performance Shares [Member] Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Selling, general and administrative expenses Selling, General and Administrative Expense Additional cash contributions planned for fiscal 2026 Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year CBlade CBlade [Member] CBlade Letter of Credit Letter of Credit [Member] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Number of operating segments Number of Operating Segments Anti-dilutive weighted-average common shares excluded from calculation of diluted earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Entity Central Index Key Entity Central Index Key Percentage of inventories determined using LIFO method Percentage of LIFO Inventory All Adjustments to Compensation All Adjustments to Compensation [Member] Equity [Abstract] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Shareholders’ equity: Equity, Attributable to Parent [Abstract] Income Statement [Abstract] Income Statement [Abstract] Document Transition Report Document Transition Report Long-term finance lease, net of short-term Finance Lease, Liability, Noncurrent Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Basis spread Debt Instrument, Basis Spread on Variable Rate City Area Code City Area Code Variable Rate [Domain] Variable Rate [Domain] Credit Agreement Credit Agreement [Member] Credit Agreement Restricted shares Restricted Stock [Member] Accumulated Other Comprehensive (Loss) Income Total accumulated other comprehensive income AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Subsequent Events Subsequent Events [Text Block] Pension liability Liability, Defined Benefit Pension Plan, Noncurrent Name Forgone Recovery, Individual Name Period of recognized compensation cost (in years) Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Net cash used for financing activities Cash Provided by (Used in) Financing Activity, Continuing Operation Statement [Line Items] Statement [Line Items] Total assets Assets Commercial space Commercial Space [Member] Commercial Space Estimate of possible loss Accrual for Environmental Loss Contingencies Gross benefit Government Assistance, Income, Increase (Decrease) Preferred shares, shares issued (in shares) Preferred Stock, Shares Issued Retirement plan liability adjustment, net of tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent Interest expense, net Interest Expense, Nonoperating Net sales Disposal Group, Including Discontinued Operation, Revenue Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Other assets Increase (Decrease) in Other Operating Assets PEO PEO [Member] Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense Share-based compensation expense (benefit) Share-Based Payment Arrangement, Expense Other long-term liabilities Other Liabilities, Noncurrent Goodwill Goodwill Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Income tax (benefit) expense from discontinued operations Discontinued Operation, Tax Effect of Discontinued Operation Shares granted in period, grant date fair value (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Subsequent Event Type [Domain] Subsequent Event Type [Domain] Debt instrument, periodic payments Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid Discontinued Operations, Disposed of by Sale Discontinued Operations, Disposed of by Sale [Member] Retained Earnings Retained Earnings [Member] Long-term operating lease liabilities, net of short-term Operating Lease, Liability, Noncurrent Revolving credit agreement Revolving Credit Facility [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common shares, shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Payment of debt issuance costs Payments of Debt Issuance Costs Diluted earnings (loss) per share (in dollars per share) Earnings Per Share, Diluted Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Total Shareholder Return Amount Total Shareholder Return Amount Diluted earnings per share from discontinued operations (in dollars per share) Discontinued operations (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Net sales Revenue Revenue from Contract with Customer, Excluding Assessed Tax Available funds Line of Credit Facility, Remaining Borrowing Capacity Interest cost Defined Benefit Plan, Interest Cost Revolving line of credit, accumulated amortization of debt issuance costs Accumulated Amortization of Debt Issuance Costs, Line of Credit Arrangements Unused capacity, commitment fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Inventories Inventory Disclosure [Text Block] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Revenue Revenue from Contract with Customer [Text Block] Professional fees Government Assistance, Professional Fees Expense, Increase (Decrease) Government Assistance, Professional Fees Expense, Increase (Decrease) Inventories Increase (Decrease) in Inventories Segment Reporting [Table] Segment Reporting [Table] Outstanding share awards that may be awarded (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Equity Method Investment [Table] Equity Method Investment [Table] Debt instrument, collateral fee Debt Instrument, Collateral Fee Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Operating profit Operating Income (Loss) Remaining performance obligation Revenue, Remaining Performance Obligation, Amount Current Fiscal Year End Date Current Fiscal Year End Date Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Service cost Defined Benefit Plan, Service Cost Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Common shares, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Finished goods Inventory, Finished Goods, Gross Cost of sales Disposal Group, Including Discontinued Operation, Costs of Goods Sold Transaction costs Disposal Group, Including Discontinued Operation, Transaction Expense Disposal Group, Including Discontinued Operation, Transaction Expense Employee Retention Credit Government Assistance [Policy Text Block] Interest incurred but not yet paid Increase (Decrease) in Interest Incurred But Not Yet Paid Increase (Decrease) in Interest Incurred But Not Yet Paid Accumulated Other Comprehensive Income Comprehensive Income (Loss) Note [Text Block] Equity Components [Axis] Equity Components [Axis] Product and Service [Domain] Product and Service [Domain] Cash paid for income taxes, net Income Tax Paid, after Refund Received Reportable Segment Reportable Segment [Member] Reportable Segment Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Entity Interactive Data Current Entity Interactive Data Current Variable Rate [Axis] Variable Rate [Axis] Employee Retention Credit Program Employee Retention Credit Program [Member] Employee Retention Credit Program Deferred income taxes, net Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Comprehensive income (loss) Comprehensive (loss) income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Termination Date Trading Arrangement Termination Date Subsequent Events [Abstract] Subsequent Events [Abstract] Income from discontinued operations, net of tax Income from discontinued operations, net of tax (Loss) income from discontinued operations, net of tax Income from discontinued operations, net of tax Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Discontinued Operations Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Settlement of environmental loss contingeny Accrual for Environmental Loss Contingencies, Payments Debt Covenant Period Two Debt Covenant Period Two [Member] Debt Covenant Period Two Other assets Other Assets, Noncurrent Debt issuance costs Debt Issuance Costs, Line of Credit Arrangements, Gross Document Type Document Type Accrued liabilities Accrued Liabilities, Current Fair Value as of Grant Date Award Grant Date Fair Value Additional amount that would have been reported in inventory if FIFO method had been used Excess of Replacement or Current Costs over Stated LIFO Value Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Loss on disposal of operating assets Loss on disposal of operating assets Gain (Loss) on Disposition of Assets Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Subsequent Event [Line Items] Subsequent Event [Line Items] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Debt instrument, fee payable Debt Instrument, Fee Payable Debt Instrument, Fee Payable Work-in-process Inventory, Work in Process, Gross Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Debt prepayment penalty Payment for Debt Extinguishment or Debt Prepayment Cost Income (loss) from continuing operations before income tax expense Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Commitments and Contingencies (Note 10) Commitments and Contingencies Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Net cash provided by investing activities Cash Provided by (Used in) Investing Activity, Discontinued Operation Accounting Standards Update and Change in Accounting Principle [Table] Accounting Standards Update and Change in Accounting Principle [Table] Decrease to SG&A Government Assistance, Selling, General And Administrative Expense, Increase (Decrease) Government Assistance, Selling, General And Administrative Expense, Increase (Decrease) Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity [Abstract] Inventories, net Total inventories, net Inventory, Net Award Type [Domain] Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Cash paid during the year: Supplemental Cash Flow Information [Abstract] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Reclassification of foreign translation adjustments to net loss Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax PEO Name PEO Name Accrued liabilities Increase (Decrease) in Accrued Liabilities Other Segment Reporting, Other Segment Item, Amount Payments on term loan Debt repayment Repayments of Secured Debt Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Interest added to promissory note — related party (paid-in-kind) Interest Expense, Debt Cash, cash equivalents and restricted cash from continuing operations at the end of the period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Accounts payable Increase (Decrease) in Accounts Payable Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Base Rate Base Rate [Member] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Fixed charge coverage ratio Debt Instrument, Covenant, Fixed Charge Coverage Ratio Debt Instrument, Covenant, Fixed Charge Coverage Ratio Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Basic earnings per share from discontinued operations (in dollars per share) Discontinued operations (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Key employees Share-Based Payment Arrangement, Employee [Member] Debt Instrument [Axis] Debt Instrument [Axis] Subsequent Event [Table] Subsequent Event [Table] Other Other Term Loan [Member] Other Term Loan Disposal Group Name [Axis] Disposal Group Name [Axis] Customer [Domain] Customer [Domain] Schedule of Inventories Schedule of Inventory, Current [Table Text Block] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic earnings (loss) per share (in dollars per share) Earnings Per Share, Basic Contract liabilities Contract liabilities — beginning balance Contract liabilities — ending balance Contract with Customer, Liability, Current Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Income from discontinued operations before income tax (benefit) expense and loss on sale Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax Award Type [Axis] Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable Accounts Receivable, after Allowance for Credit Loss, Current Retained earnings Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [Axis] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Shares Common Stock [Member] Share transactions under equity-based plans (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, After Forfeiture, Net Shares Issued, Shares, Share-Based Payment Arrangement, After Forfeiture, Net Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Debt instrument, fee paid Debt Instrument, Fee Paid Debt Instrument, Fee Paid Decrease to COGS Government Assistance, Cost Of Goods Sold, Increase (Decrease) Government Assistance, Cost Of Goods Sold, Increase (Decrease) Proceeds from term loan Proceeds from Issuance of Other Long-Term Debt Percentage of concentration risk Concentration Risk, Percentage Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Performance and restricted share expense APIC, Share-Based Payment Arrangement, Recognition and Exercise Equity Awards Adjustments Equity Awards Adjustments [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Total liabilities and shareholders’ equity Liabilities and Equity Employee Stock Option Share-Based Payment Arrangement, Option [Member] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Plan Name [Axis] Plan Name [Axis] Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Debt Covenant Period One Debt Covenant Period One [Member] Debt Covenant Period One Tabular List, Table Tabular List [Table Text Block] Vesting [Axis] Vesting [Axis] Additional paid-in capital Additional Paid in Capital Other expense (income), net Other Nonoperating Income (Expense) Debt Long-Term Debt [Text Block] Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Shares forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Loss on sale of discontinued operations before income tax expense Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax Commercial product and other revenue Commercial Product And Other Revenue [Member] Commercial Product And Other Revenue [Member] Preferred shares, shares authorized (in shares) Preferred Stock, Shares Authorized Raw materials and supplies Inventory, Raw Materials and Supplies, Gross Serial preferred shares, no par value, authorized 1,000 shares; zero shares issued and outstanding at June 30, 2026 and September 30, 2025 Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Commercial revenue Commercial Revenue [Member] Commercial Revenue [Member] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activity Capital expenditures Payments to Acquire Productive Assets Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Cumulative translation adjustment Foreign currency translation adjustment Translation Adjustment Functional to Reporting Currency, Increase (Decrease), Gross of Tax Payments received in advance of performance obligations Contract With Customer, Liability, Payments Received In Advance Of Performance Obligations Contract With Customer, Liability, Payments Received In Advance Of Performance Obligations Loan Agreement Loan Agreement [Member] Loan Agreement Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Total long-term debt Long-Term Debt and Lease Obligation Discontinued Operations and Disposal Groups [Abstract] Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Other expenses Other Noncash Income (Expense) Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Change In Contract With Customer, Liability [Roll Forward] Change In Contract With Customer, Liability [Roll Forward] Change In Contract With Customer, Liability [Roll Forward] Additional Paid-In Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Amortization of debt issuance costs Amortization And Write Off Of Debt Issuance Cost Amortization And Write Off Of Debt Issuance Cost Name Trading Arrangement, Individual Name Total unrecognized compensation cost related to performance and restricted shares Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Cash and cash equivalents Cash and Cash Equivalent Charges to expense Accrual for Environmental Loss Contingencies, Charges to Expense for New Losses Debt issuance costs — incurred but not yet paid Debt Issuance Costs Incurred During Noncash or Partial Noncash Transaction Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Fixed wing aircraft Fixed Wing Aircraft Revenue [Member] Fixed Wing Aircraft Revenue [Member] Company Selected Measure Amount Company Selected Measure Amount Depreciation and amortization Depreciation, Depletion and Amortization Debt instrument, covenant, availability block Debt Instrument, Covenant, Availability Block Debt Instrument, Covenant, Availability Block Secured Overnight Financing Rate (SOFR) Secured Overnight Financing Rate (SOFR) [Member] Current assets: Assets, Current [Abstract] Prime Rate Prime Rate [Member] Government Assistance, Type [Domain] Government Assistance, Type [Domain] Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Income tax expense Income Tax Expense (Benefit) Foreign currency exchange loss (gain), net Gain (Loss), Foreign Currency Transaction, before Tax Customer Concentration Risk Customer Concentration Risk [Member] Cost of goods sold Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Decrease in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Receivables, net of allowance for credit losses of $138 and $151, respectively Accounts and Financing Receivable, after Allowance for Credit Loss, Current Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Amortization of net loss Defined Benefit Plan, Amortization of Gain (Loss) Cash contribution Defined Benefit Plan, Plan Assets, Cash Contribution Defined Benefit Plan, Plan Assets, Cash Contribution Net income (loss) Net income (loss) Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Unamortized debt issuance costs Unamortized Debt Issuance Expense Statement [Table] Statement [Table] Tranche Two Share-Based Payment Arrangement, Tranche Two [Member] Restatement Determination Date: Restatement Determination Date [Axis] Schedule of Components of Accumulated Other Comprehensive Income Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Non employee Share-Based Payment Arrangement, Nonemployee [Member] Impairment loss on contract assets Capitalized Contract Cost, Impairment Loss Schedule of Contract Assets and Liabilities Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Income (loss) from continuing operations Income (loss) from continuing operations Income (loss) from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]