3.26.1 html 328 523 1 true 95 0 false 5 false false R1.htm 000 - Document - Document And Entity Information Sheet http://www.amsc.com/20260331/role/statement-document-and-entity-information Document And Entity Information Cover 1 false false R2.htm 001 - Statement - Consolidated Balance Sheets Sheet http://www.amsc.com/20260331/role/statement-consolidated-balance-sheets Consolidated Balance Sheets Statements 2 false false R3.htm 002 - Statement - Consolidated Balance Sheets (Parentheticals) Sheet http://www.amsc.com/20260331/role/statement-consolidated-balance-sheets-parentheticals Consolidated Balance Sheets (Parentheticals) Statements 3 false false R4.htm 003 - Statement - Consolidated Statements of Operations Sheet http://www.amsc.com/20260331/role/statement-consolidated-statements-of-operations Consolidated Statements of Operations Statements 4 false false R5.htm 004 - Statement - Consolidated Statements of Comprehensive Income (Loss) Sheet http://www.amsc.com/20260331/role/statement-consolidated-statements-of-comprehensive-income-loss Consolidated Statements of Comprehensive Income (Loss) Statements 5 false false R6.htm 005 - Statement - Consolidated Statements of Stockholders' Equity Sheet http://www.amsc.com/20260331/role/statement-consolidated-statements-of-stockholders-equity Consolidated Statements of Stockholders' Equity Statements 6 false false R7.htm 006 - Statement - Consolidated Statements of Cash Flows Sheet http://www.amsc.com/20260331/role/statement-consolidated-statements-of-cash-flows Consolidated Statements of Cash Flows Statements 7 false false R8.htm 995443 - Disclosure - Award Timing Disclosure Sheet http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure Award Timing Disclosure Notes 8 false false R9.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 9 false false R10.htm 995447 - Disclosure - Insider Trading Policies and Procedures Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc Insider Trading Policies and Procedures Notes 10 false false R11.htm 995550 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure Sheet http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure Cybersecurity Risk Management and Strategy Disclosure Notes 11 false false R12.htm 995552 - Disclosure - Note 1 - Nature of the Business and Operations and Liquidity Sheet http://www.amsc.com/20260331/role/statement-note-1-nature-of-the-business-and-operations-and-liquidity Note 1 - Nature of the Business and Operations and Liquidity Notes 12 false false R13.htm 995553 - Disclosure - Note 2 - Acquisition Sheet http://www.amsc.com/20260331/role/statement-note-2-acquisition Note 2 - Acquisition Notes 13 false false R14.htm 995554 - Disclosure - Note 3 - Summary of Significant Accounting Policies Sheet http://www.amsc.com/20260331/role/statement-note-3-summary-of-significant-accounting-policies Note 3 - Summary of Significant Accounting Policies Notes 14 false false R15.htm 995555 - Disclosure - Note 4 - Revenue Recognition Sheet http://www.amsc.com/20260331/role/statement-note-4-revenue-recognition Note 4 - Revenue Recognition Notes 15 false false R16.htm 995556 - Disclosure - Note 5 - Goodwill Sheet http://www.amsc.com/20260331/role/statement-note-5-goodwill Note 5 - Goodwill Notes 16 false false R17.htm 995557 - Disclosure - Note 6 - Fair Value Measurements Sheet http://www.amsc.com/20260331/role/statement-note-6-fair-value-measurements Note 6 - Fair Value Measurements Notes 17 false false R18.htm 995558 - Disclosure - Note 7 - Accounts Receivable Sheet http://www.amsc.com/20260331/role/statement-note-7-accounts-receivable Note 7 - Accounts Receivable Notes 18 false false R19.htm 995559 - Disclosure - Note 8 - Inventory Sheet http://www.amsc.com/20260331/role/statement-note-8-inventory Note 8 - Inventory Notes 19 false false R20.htm 995560 - Disclosure - Note 9 - Property, Plant and Equipment Sheet http://www.amsc.com/20260331/role/statement-note-9-property-plant-and-equipment Note 9 - Property, Plant and Equipment Notes 20 false false R21.htm 995561 - Disclosure - Note 10 - Intangible Assets Sheet http://www.amsc.com/20260331/role/statement-note-10-intangible-assets Note 10 - Intangible Assets Notes 21 false false R22.htm 995562 - Disclosure - Note 11 - Equity-Method Investments Sheet http://www.amsc.com/20260331/role/statement-note-11-equitymethod-investments Note 11 - Equity-Method Investments Notes 22 false false R23.htm 995563 - Disclosure - Note 12 - Accounts Payable and Accrued Expenses Sheet http://www.amsc.com/20260331/role/statement-note-12-accounts-payable-and-accrued-expenses Note 12 - Accounts Payable and Accrued Expenses Notes 23 false false R24.htm 995564 - Disclosure - Note 13 - Contingent Consideration Sheet http://www.amsc.com/20260331/role/statement-note-13-contingent-consideration Note 13 - Contingent Consideration Notes 24 false false R25.htm 995565 - Disclosure - Note 14 - Income Taxes Sheet http://www.amsc.com/20260331/role/statement-note-14-income-taxes Note 14 - Income Taxes Notes 25 false false R26.htm 995566 - Disclosure - Note 15 - Debt Sheet http://www.amsc.com/20260331/role/statement-note-15-debt Note 15 - Debt Notes 26 false false R27.htm 995567 - Disclosure - Note 16 - Leases Sheet http://www.amsc.com/20260331/role/statement-note-16-leases- Note 16 - Leases Notes 27 false false R28.htm 995568 - Disclosure - Note 17 - Stockholders' Equity Sheet http://www.amsc.com/20260331/role/statement-note-17-stockholders-equity Note 17 - Stockholders' Equity Notes 28 false false R29.htm 995569 - Disclosure - Note 18 - Commitments and Contingencies Sheet http://www.amsc.com/20260331/role/statement-note-18-commitments-and-contingencies Note 18 - Commitments and Contingencies Notes 29 false false R30.htm 995570 - Disclosure - Note 19 - Employee Benefit Plans Sheet http://www.amsc.com/20260331/role/statement-note-19-employee-benefit-plans- Note 19 - Employee Benefit Plans Notes 30 false false R31.htm 995571 - Disclosure - Note 20 - Business Segments Sheet http://www.amsc.com/20260331/role/statement-note-20-business-segments Note 20 - Business Segments Notes 31 false false R32.htm 995572 - Disclosure - Note 21 - Recent Accounting Pronouncements Sheet http://www.amsc.com/20260331/role/statement-note-21-recent-accounting-pronouncements Note 21 - Recent Accounting Pronouncements Notes 32 false false R33.htm 995573 - Disclosure - Note 22 - Subsequent Events Sheet http://www.amsc.com/20260331/role/statement-note-22-subsequent-events Note 22 - Subsequent Events Notes 33 false false R34.htm 995577 - Disclosure - Significant Accounting Policies (Policies) Sheet http://www.amsc.com/20260331/role/statement-significant-accounting-policies-policies Significant Accounting Policies (Policies) Policies http://www.amsc.com/20260331/role/statement-note-3-summary-of-significant-accounting-policies 34 false false R35.htm 995578 - Disclosure - Note 2 - Acquisition (Tables) Sheet http://www.amsc.com/20260331/role/statement-note-2-acquisition-tables Note 2 - Acquisition (Tables) Tables http://www.amsc.com/20260331/role/statement-note-2-acquisition 35 false false R36.htm 995579 - Disclosure - Note 3 - Summary of Significant Accounting Policies (Tables) Sheet http://www.amsc.com/20260331/role/statement-note-3-summary-of-significant-accounting-policies-tables Note 3 - Summary of Significant Accounting Policies (Tables) Tables http://www.amsc.com/20260331/role/statement-note-3-summary-of-significant-accounting-policies 36 false false R37.htm 995580 - Disclosure - Note 4 - Revenue Recognition (Tables) Sheet http://www.amsc.com/20260331/role/statement-note-4-revenue-recognition-tables Note 4 - Revenue Recognition (Tables) Tables http://www.amsc.com/20260331/role/statement-note-4-revenue-recognition 37 false false R38.htm 995581 - Disclosure - Note 5 - Goodwill (Tables) Sheet http://www.amsc.com/20260331/role/statement-note-5-goodwill-tables Note 5 - Goodwill (Tables) Tables http://www.amsc.com/20260331/role/statement-note-5-goodwill 38 false false R39.htm 995582 - Disclosure - Note 6 - Fair Value Measurements (Tables) Sheet http://www.amsc.com/20260331/role/statement-note-6-fair-value-measurements-tables Note 6 - Fair Value Measurements (Tables) Tables http://www.amsc.com/20260331/role/statement-note-6-fair-value-measurements 39 false false R40.htm 995583 - Disclosure - Note 7 - Accounts Receivable (Tables) Sheet http://www.amsc.com/20260331/role/statement-note-7-accounts-receivable-tables Note 7 - Accounts Receivable (Tables) Tables http://www.amsc.com/20260331/role/statement-note-7-accounts-receivable 40 false false R41.htm 995584 - Disclosure - Note 8 - Inventory (Tables) Sheet http://www.amsc.com/20260331/role/statement-note-8-inventory-tables Note 8 - Inventory (Tables) Tables http://www.amsc.com/20260331/role/statement-note-8-inventory 41 false false R42.htm 995585 - Disclosure - Note 9 - Property, Plant and Equipment (Tables) Sheet http://www.amsc.com/20260331/role/statement-note-9-property-plant-and-equipment-tables Note 9 - Property, Plant and Equipment (Tables) Tables http://www.amsc.com/20260331/role/statement-note-9-property-plant-and-equipment 42 false false R43.htm 995586 - Disclosure - Note 10 - Intangible Assets (Tables) Sheet http://www.amsc.com/20260331/role/statement-note-10-intangible-assets-tables Note 10 - Intangible Assets (Tables) Tables http://www.amsc.com/20260331/role/statement-note-10-intangible-assets 43 false false R44.htm 995587 - Disclosure - Note 11 - Equity-Method Investments (Tables) Sheet http://www.amsc.com/20260331/role/statement-note-11-equitymethod-investments-tables Note 11 - Equity-Method Investments (Tables) Tables http://www.amsc.com/20260331/role/statement-note-11-equitymethod-investments 44 false false R45.htm 995588 - Disclosure - Note 12 - Accounts Payable and Accrued Expenses (Tables) Sheet http://www.amsc.com/20260331/role/statement-note-12-accounts-payable-and-accrued-expenses-tables Note 12 - Accounts Payable and Accrued Expenses (Tables) Tables http://www.amsc.com/20260331/role/statement-note-12-accounts-payable-and-accrued-expenses 45 false false R46.htm 995589 - Disclosure - Note 13 - Contingent Consideration (Tables) Sheet http://www.amsc.com/20260331/role/statement-note-13-contingent-consideration-tables Note 13 - Contingent Consideration (Tables) Tables http://www.amsc.com/20260331/role/statement-note-13-contingent-consideration 46 false false R47.htm 995590 - Disclosure - Note 14 - Income Taxes (Tables) Sheet http://www.amsc.com/20260331/role/statement-note-14-income-taxes-tables Note 14 - Income Taxes (Tables) Tables http://www.amsc.com/20260331/role/statement-note-14-income-taxes 47 false false R48.htm 995591 - Disclosure - Note 16 - Leases (Tables) Sheet http://www.amsc.com/20260331/role/statement-note-16-leases-tables Note 16 - Leases (Tables) Tables http://www.amsc.com/20260331/role/statement-note-16-leases- 48 false false R49.htm 995592 - Disclosure - Note 17 - Stockholders' Equity (Tables) Sheet http://www.amsc.com/20260331/role/statement-note-17-stockholders-equity-tables Note 17 - Stockholders' Equity (Tables) Tables http://www.amsc.com/20260331/role/statement-note-17-stockholders-equity 49 false false R50.htm 995593 - Disclosure - Note 20 - Business Segments (Tables) Sheet http://www.amsc.com/20260331/role/statement-note-20-business-segments-tables Note 20 - Business Segments (Tables) Tables http://www.amsc.com/20260331/role/statement-note-20-business-segments 50 false false R51.htm 995594 - Disclosure - Note 1 - Nature of the Business and Operations and Liquidity (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-1-nature-of-the-business-and-operations-and-liquidity-details-textual Note 1 - Nature of the Business and Operations and Liquidity (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-1-nature-of-the-business-and-operations-and-liquidity 51 false false R52.htm 995595 - Disclosure - Note 2 - Acquisition 1 (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-2-acquisition-1-details-textual Note 2 - Acquisition 1 (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-2-acquisition-tables 52 false false R53.htm 995596 - Disclosure - Note 2 - Acquisition 2 (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-2-acquisition-2-details-textual Note 2 - Acquisition 2 (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-2-acquisition-tables 53 false false R54.htm 995597 - Disclosure - Note 2 - Acquisition - Schedule of Business Acquisitions (Details) Sheet http://www.amsc.com/20260331/role/statement-note-2-acquisition-schedule-of-business-acquisitions-details Note 2 - Acquisition - Schedule of Business Acquisitions (Details) Details 54 false false R55.htm 995598 - Disclosure - Note 2 - Acquisition - Schedule of Business Acquisitions (Details) (Parentheticals) Sheet http://www.amsc.com/20260331/role/statement-note-2-acquisition-schedule-of-business-acquisitions-details-parentheticals Note 2 - Acquisition - Schedule of Business Acquisitions (Details) (Parentheticals) Details 55 false false R56.htm 995599 - Disclosure - Note 2 - Acquisition - Assets Acquired and Liabilities Assumed (Details) Sheet http://www.amsc.com/20260331/role/statement-note-2-acquisition-assets-acquired-and-liabilities-assumed-details Note 2 - Acquisition - Assets Acquired and Liabilities Assumed (Details) Details 56 false false R57.htm 995600 - Disclosure - Note 2 - Acquisition - Pro Forma Information (Details) Sheet http://www.amsc.com/20260331/role/statement-note-2-acquisition-pro-forma-information-details Note 2 - Acquisition - Pro Forma Information (Details) Details 57 false false R58.htm 995601 - Disclosure - Note 3 - Summary of Significant Accounting Policies (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-3-summary-of-significant-accounting-policies-details-textual Note 3 - Summary of Significant Accounting Policies (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-3-summary-of-significant-accounting-policies-tables 58 false false R59.htm 995602 - Disclosure - Note 3 - Summary of Significant Accounting Policies - Property Plant and Equipment Useful Life (Details) Sheet http://www.amsc.com/20260331/role/statement-note-3-summary-of-significant-accounting-policies-property-plant-and-equipment-useful-life-details Note 3 - Summary of Significant Accounting Policies - Property Plant and Equipment Useful Life (Details) Details 59 false false R60.htm 995603 - Disclosure - Note 3 - Summary of Significant Accounting Policies - Reconciliation of Numerators and Denominators of EPS Calculation (Details) Sheet http://www.amsc.com/20260331/role/statement-note-3-summary-of-significant-accounting-policies-reconciliation-of-numerators-and-denominators-of-eps-calculation-details Note 3 - Summary of Significant Accounting Policies - Reconciliation of Numerators and Denominators of EPS Calculation (Details) Details 60 false false R61.htm 995604 - Disclosure - Note 4 - Revenue Recognition 1 (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-4-revenue-recognition-1-details-textual Note 4 - Revenue Recognition 1 (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-4-revenue-recognition-tables 61 false false R62.htm 995605 - Disclosure - Note 4 - Revenue Recognition 2 (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-4-revenue-recognition-2-details-textual Note 4 - Revenue Recognition 2 (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-4-revenue-recognition-tables 62 false false R63.htm 995606 - Disclosure - Note 4 - Revenue Recognition - Disaggregation of Revenue (Details) Sheet http://www.amsc.com/20260331/role/statement-note-4-revenue-recognition-disaggregation-of-revenue-details Note 4 - Revenue Recognition - Disaggregation of Revenue (Details) Details 63 false false R64.htm 995607 - Disclosure - Note 4 - Revenue Recognition - Contract Assets and Liabilities (Details) Sheet http://www.amsc.com/20260331/role/statement-note-4-revenue-recognition-contract-assets-and-liabilities-details Note 4 - Revenue Recognition - Contract Assets and Liabilities (Details) Details 64 false false R65.htm 995608 - Disclosure - Note 4 - Revenue Recognition - Revenues by Major Customers (Details) Sheet http://www.amsc.com/20260331/role/statement-note-4-revenue-recognition-revenues-by-major-customers-details Note 4 - Revenue Recognition - Revenues by Major Customers (Details) Details 65 false false R66.htm 995609 - Disclosure - Note 5 - Goodwill (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-5-goodwill-details-textual Note 5 - Goodwill (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-5-goodwill-tables 66 false false R67.htm 995610 - Disclosure - Note 5 - Goodwill - Schedule of Goodwill (Details) Sheet http://www.amsc.com/20260331/role/statement-note-5-goodwill-schedule-of-goodwill-details Note 5 - Goodwill - Schedule of Goodwill (Details) Details 67 false false R68.htm 995611 - Disclosure - Note 6 - Fair Value Measurements (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-6-fair-value-measurements-details-textual Note 6 - Fair Value Measurements (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-6-fair-value-measurements-tables 68 false false R69.htm 995612 - Disclosure - Note 6 - Fair Value Measurements - Assets and Liabilities Carried at Fair Value on a Recurring Basis (Details) Sheet http://www.amsc.com/20260331/role/statement-note-6-fair-value-measurements-assets-and-liabilities-carried-at-fair-value-on-a-recurring-basis-details Note 6 - Fair Value Measurements - Assets and Liabilities Carried at Fair Value on a Recurring Basis (Details) Details 69 false false R70.htm 995613 - Disclosure - Note 6 - Fair Value Measurements - Derivative Liability Measured at Fair Value (Details) Sheet http://www.amsc.com/20260331/role/statement-note-6-fair-value-measurements-derivative-liability-measured-at-fair-value-details Note 6 - Fair Value Measurements - Derivative Liability Measured at Fair Value (Details) Details 70 false false R71.htm 995614 - Disclosure - Note 7 - Accounts Receivable - Summary of Accounts Receivable (Details) Sheet http://www.amsc.com/20260331/role/statement-note-7-accounts-receivable-summary-of-accounts-receivable-details Note 7 - Accounts Receivable - Summary of Accounts Receivable (Details) Details 71 false false R72.htm 995615 - Disclosure - Note 8 - Inventory (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-8-inventory-details-textual Note 8 - Inventory (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-8-inventory-tables 72 false false R73.htm 995616 - Disclosure - Note 8 - Inventory - Summary of Net Inventory (Details) Sheet http://www.amsc.com/20260331/role/statement-note-8-inventory-summary-of-net-inventory-details Note 8 - Inventory - Summary of Net Inventory (Details) Details 73 false false R74.htm 995617 - Disclosure - Note 9 - Property, Plant and Equipment (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-9-property-plant-and-equipment-details-textual Note 9 - Property, Plant and Equipment (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-9-property-plant-and-equipment-tables 74 false false R75.htm 995618 - Disclosure - Note 9 - Property, Plant and Equipment - Cost and Accumulated Depreciation of Property and Equipment (Details) Sheet http://www.amsc.com/20260331/role/statement-note-9-property-plant-and-equipment-cost-and-accumulated-depreciation-of-property-and-equipment-details Note 9 - Property, Plant and Equipment - Cost and Accumulated Depreciation of Property and Equipment (Details) Details 75 false false R76.htm 995619 - Disclosure - Note 10 - Intangible Assets (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-10-intangible-assets-details-textual Note 10 - Intangible Assets (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-10-intangible-assets-tables 76 false false R77.htm 995620 - Disclosure - Note 10 - Intangible Assets - Intangible Assets (Details) Sheet http://www.amsc.com/20260331/role/statement-note-10-intangible-assets-intangible-assets-details Note 10 - Intangible Assets - Intangible Assets (Details) Details 77 false false R78.htm 995621 - Disclosure - Note 10 - Intangible Assets - Expected Future Amortization Expense (Details) Sheet http://www.amsc.com/20260331/role/statement-note-10-intangible-assets-expected-future-amortization-expense-details Note 10 - Intangible Assets - Expected Future Amortization Expense (Details) Details 78 false false R79.htm 995622 - Disclosure - Note 11 - Equity-Method Investments (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-11-equitymethod-investments-details-textual Note 11 - Equity-Method Investments (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-11-equitymethod-investments-tables 79 false false R80.htm 995623 - Disclosure - Note 11 - Equity-Method Investments - Schedule of Equity Method Investment Summarized Financial Information (Details) Sheet http://www.amsc.com/20260331/role/statement-note-11-equitymethod-investments-schedule-of-equity-method-investment-summarized-financial-information-details Note 11 - Equity-Method Investments - Schedule of Equity Method Investment Summarized Financial Information (Details) Details 80 false false R81.htm 995624 - Disclosure - Note 12 - Accounts Payable and Accrued Expenses (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-12-accounts-payable-and-accrued-expenses-details-textual Note 12 - Accounts Payable and Accrued Expenses (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-12-accounts-payable-and-accrued-expenses-tables 81 false false R82.htm 995625 - Disclosure - Note 12 - Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Details) Sheet http://www.amsc.com/20260331/role/statement-note-12-accounts-payable-and-accrued-expenses-summary-of-accounts-payable-and-accrued-expenses-details Note 12 - Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Details) Details 82 false false R83.htm 995626 - Disclosure - Note 12 - Accounts Payable and Accrued Expenses - Product Warranty Activity (Details) Sheet http://www.amsc.com/20260331/role/statement-note-12-accounts-payable-and-accrued-expenses-product-warranty-activity-details Note 12 - Accounts Payable and Accrued Expenses - Product Warranty Activity (Details) Details 83 false false R84.htm 995627 - Disclosure - Note 13 - Contingent Consideration (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-13-contingent-consideration-details-textual Note 13 - Contingent Consideration (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-13-contingent-consideration-tables 84 false false R85.htm 995628 - Disclosure - Note 13 - Contingent Consideration - Summary of the Key Assumptions Used to Calculate Fair Value of Warrants (Details) Sheet http://www.amsc.com/20260331/role/statement-note-13-contingent-consideration-summary-of-the-key-assumptions-used-to-calculate-fair-value-of-warrants-details Note 13 - Contingent Consideration - Summary of the Key Assumptions Used to Calculate Fair Value of Warrants (Details) Details 85 false false R86.htm 995629 - Disclosure - Note 14 - Income Taxes (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-14-income-taxes-details-textual Note 14 - Income Taxes (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-14-income-taxes-tables 86 false false R87.htm 995630 - Disclosure - Note 14 - Income Taxes - Income (Loss) Before Income Tax Expense (Details) Sheet http://www.amsc.com/20260331/role/statement-note-14-income-taxes-income-loss-before-income-tax-expense-details Note 14 - Income Taxes - Income (Loss) Before Income Tax Expense (Details) Details 87 false false R88.htm 995631 - Disclosure - Note 14 - Income Taxes - Components of Income Tax Expense (Benefit) (Details) Sheet http://www.amsc.com/20260331/role/statement-note-14-income-taxes-components-of-income-tax-expense-benefit-details Note 14 - Income Taxes - Components of Income Tax Expense (Benefit) (Details) Details 88 false false R89.htm 995632 - Disclosure - Note 14 - Income Taxes - Income Tax Rate Reconciliation (Details) Sheet http://www.amsc.com/20260331/role/statement-note-14-income-taxes-income-tax-rate-reconciliation-details Note 14 - Income Taxes - Income Tax Rate Reconciliation (Details) Details 89 false false R90.htm 995633 - Disclosure - Note 14 - Income Taxes - Schedule of Income Taxes Paid (Details) Sheet http://www.amsc.com/20260331/role/statement-note-14-income-taxes-schedule-of-income-taxes-paid-details Note 14 - Income Taxes - Schedule of Income Taxes Paid (Details) Details 90 false false R91.htm 995634 - Disclosure - Note 14 - Income Taxes - Deferred Tax Assets and Liabilities (Details) Sheet http://www.amsc.com/20260331/role/statement-note-14-income-taxes-deferred-tax-assets-and-liabilities-details Note 14 - Income Taxes - Deferred Tax Assets and Liabilities (Details) Details 91 false false R92.htm 995635 - Disclosure - Note 15 - Debt (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-15-debt-details-textual Note 15 - Debt (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-15-debt 92 false false R93.htm 995636 - Disclosure - Note 16 - Leases (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-16-leases-details-textual Note 16 - Leases (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-16-leases-tables 93 false false R94.htm 995637 - Disclosure - Note 16 - Leases - Operating Lease Assets and Liabilities (Details) Sheet http://www.amsc.com/20260331/role/statement-note-16-leases-operating-lease-assets-and-liabilities-details Note 16 - Leases - Operating Lease Assets and Liabilities (Details) Details 94 false false R95.htm 995638 - Disclosure - Note 16 - Leases - Lease Cost (Details) Sheet http://www.amsc.com/20260331/role/statement-note-16-leases-lease-cost-details Note 16 - Leases - Lease Cost (Details) Details 95 false false R96.htm 995639 - Disclosure - Note 16 - Leases - Minimum Future Lease Obligation (Details) Sheet http://www.amsc.com/20260331/role/statement-note-16-leases-minimum-future-lease-obligation-details Note 16 - Leases - Minimum Future Lease Obligation (Details) Details 96 false false R97.htm 995640 - Disclosure - Note 17 - Stockholders' Equity (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-17-stockholders-equity-details-textual Note 17 - Stockholders' Equity (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-17-stockholders-equity-tables 97 false false R98.htm 995641 - Disclosure - Note 17 - Stockholders' Equity - Components of Employee Stock-based Compensation (Details) Sheet http://www.amsc.com/20260331/role/statement-note-17-stockholders-equity-components-of-employee-stockbased-compensation-details Note 17 - Stockholders' Equity - Components of Employee Stock-based Compensation (Details) Details 98 false false R99.htm 995642 - Disclosure - Note 17 - Stockholders' Equity - Stock-based Compensation Expense by Financial Statement Line Item (Details) Sheet http://www.amsc.com/20260331/role/statement-note-17-stockholders-equity-stockbased-compensation-expense-by-financial-statement-line-item-details Note 17 - Stockholders' Equity - Stock-based Compensation Expense by Financial Statement Line Item (Details) Details 99 false false R100.htm 995643 - Disclosure - Note 17 - Stockholders' Equity - Stock-based Compensation Expense by Financial Statement Line Item 2 (Details) Sheet http://www.amsc.com/20260331/role/statement-note-17-stockholders-equity-stockbased-compensation-expense-by-financial-statement-line-item-2-details Note 17 - Stockholders' Equity - Stock-based Compensation Expense by Financial Statement Line Item 2 (Details) Details 100 false false R101.htm 995644 - Disclosure - Note 17 - Stockholders' Equity - Options Activities (Details) Sheet http://www.amsc.com/20260331/role/statement-note-17-stockholders-equity-options-activities-details Note 17 - Stockholders' Equity - Options Activities (Details) Details 101 false false R102.htm 995645 - Disclosure - Note 17 - Stockholders' Equity - Weighted Average Assumptions Used in The Black Scholes Valuation Model (Details) Sheet http://www.amsc.com/20260331/role/statement-note-17-stockholders-equity-weighted-average-assumptions-used-in-the-black-scholes-valuation-model-details Note 17 - Stockholders' Equity - Weighted Average Assumptions Used in The Black Scholes Valuation Model (Details) Details 102 false false R103.htm 995646 - Disclosure - Note 17 - Stockholders' Equity - Restricted Stock Activity (Details) Sheet http://www.amsc.com/20260331/role/statement-note-17-stockholders-equity-restricted-stock-activity-details Note 17 - Stockholders' Equity - Restricted Stock Activity (Details) Details 103 false false R104.htm 995647 - Disclosure - Note 18 - Commitments and Contingencies (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-18-commitments-and-contingencies-details-textual Note 18 - Commitments and Contingencies (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-18-commitments-and-contingencies 104 false false R105.htm 995648 - Disclosure - Note 19 - Employee Benefit Plans (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-19-employee-benefit-plans-details-textual Note 19 - Employee Benefit Plans (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-19-employee-benefit-plans- 105 false false R106.htm 995649 - Disclosure - Note 20 - Business Segments (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-20-business-segments-details-textual Note 20 - Business Segments (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-20-business-segments-tables 106 false false R107.htm 995650 - Disclosure - Note 20 - Business Segments - Operating Results for Business Segments (Details) Sheet http://www.amsc.com/20260331/role/statement-note-20-business-segments-operating-results-for-business-segments-details Note 20 - Business Segments - Operating Results for Business Segments (Details) Details 107 false false R108.htm 995651 - Disclosure - Note 20 - Business Segments - Total Business Segments Assets (Details) Sheet http://www.amsc.com/20260331/role/statement-note-20-business-segments-total-business-segments-assets-details Note 20 - Business Segments - Total Business Segments Assets (Details) Details 108 false false R109.htm 995652 - Disclosure - Note 20 - Business Segments - Geographic Information about Property, Plant and Equipment Associated with Particular Regions (Details) Sheet http://www.amsc.com/20260331/role/statement-note-20-business-segments-geographic-information-about-property-plant-and-equipment-associated-with-particular-regions-details Note 20 - Business Segments - Geographic Information about Property, Plant and Equipment Associated with Particular Regions (Details) Details 109 false false R110.htm 995653 - Disclosure - Note 22 - Subsequent Events (Details Textual) Sheet http://www.amsc.com/20260331/role/statement-note-22-subsequent-events-details-textual Note 22 - Subsequent Events (Details Textual) Details http://www.amsc.com/20260331/role/statement-note-22-subsequent-events 110 false false All Reports Book All Reports amsc-20260331.xsd amsc-20260331_cal.xml amsc-20260331_def.xml amsc-20260331_lab.xml amsc-20260331_pre.xml amsc20260331_10k.htm stockchart.jpg http://fasb.org/us-gaap/2026 http://xbrl.sec.gov/cyd/2026 http://xbrl.sec.gov/dei/2026 http://xbrl.sec.gov/ecd/2026 true true