3.26.1 html 198 311 1 true 57 0 false 5 false false R1.htm 000 - Document - Document And Entity Information Sheet http://www.amsc.com/20260630/role/statement-document-and-entity-information Document And Entity Information Cover 1 false false R2.htm 001 - Statement - Unaudited Condensed Consolidated Balance Sheets Sheet http://www.amsc.com/20260630/role/statement-unaudited-condensed-consolidated-balance-sheets Unaudited Condensed Consolidated Balance Sheets Statements 2 false false R3.htm 002 - Statement - Unaudited Condensed Consolidated Balance Sheets (Parentheticals) Sheet http://www.amsc.com/20260630/role/statement-unaudited-condensed-consolidated-balance-sheets-parentheticals Unaudited Condensed Consolidated Balance Sheets (Parentheticals) Statements 3 false false R4.htm 003 - Statement - Unaudited Condensed Consolidated Statements of Operations Sheet http://www.amsc.com/20260630/role/statement-unaudited-condensed-consolidated-statements-of-operations Unaudited Condensed Consolidated Statements of Operations Statements 4 false false R5.htm 004 - Statement - Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) Sheet http://www.amsc.com/20260630/role/statement-unaudited-condensed-consolidated-statements-of-comprehensive-income-loss Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) Statements 5 false false R6.htm 005 - Statement - Unaudited Condensed Consolidated Statements of Stockholders' Equity Sheet http://www.amsc.com/20260630/role/statement-unaudited-condensed-consolidated-statements-of-stockholders-equity Unaudited Condensed Consolidated Statements of Stockholders' Equity Statements 6 false false R7.htm 006 - Statement - Unaudited Condensed Consolidated Statements of Cash Flows Sheet http://www.amsc.com/20260630/role/statement-unaudited-condensed-consolidated-statements-of-cash-flows Unaudited Condensed Consolidated Statements of Cash Flows Statements 7 false false R8.htm 007 - Disclosure - Note 1 - Nature of the Business and Operations Sheet http://www.amsc.com/20260630/role/statement-note-1-nature-of-the-business-and-operations Note 1 - Nature of the Business and Operations Notes 8 false false R9.htm 008 - Disclosure - Note 2 - Acquisition Sheet http://www.amsc.com/20260630/role/statement-note-2-acquisition Note 2 - Acquisition Notes 9 false false R10.htm 009 - Disclosure - Note 3 - Revenue Recognition Sheet http://www.amsc.com/20260630/role/statement-note-3-revenue-recognition Note 3 - Revenue Recognition Notes 10 false false R11.htm 010 - Disclosure - Note 4 - Stock-based Compensation Sheet http://www.amsc.com/20260630/role/statement-note-4-stockbased-compensation Note 4 - Stock-based Compensation Notes 11 false false R12.htm 011 - Disclosure - Note 5 - Computation of Net Income Per Share of Common Stock Sheet http://www.amsc.com/20260630/role/statement-note-5-computation-of-net-income-per-share-of-common-stock Note 5 - Computation of Net Income Per Share of Common Stock Notes 12 false false R13.htm 012 - Disclosure - Note 6 - Goodwill and Other Intangibles Sheet http://www.amsc.com/20260630/role/statement-note-6-goodwill-and-other-intangibles Note 6 - Goodwill and Other Intangibles Notes 13 false false R14.htm 013 - Disclosure - Note 7 - Fair Value Measurements Sheet http://www.amsc.com/20260630/role/statement-note-7-fair-value-measurements Note 7 - Fair Value Measurements Notes 14 false false R15.htm 014 - Disclosure - Note 8 - Accounts Receivable Sheet http://www.amsc.com/20260630/role/statement-note-8-accounts-receivable Note 8 - Accounts Receivable Notes 15 false false R16.htm 015 - Disclosure - Note 9 - Inventory Sheet http://www.amsc.com/20260630/role/statement-note-9-inventory Note 9 - Inventory Notes 16 false false R17.htm 016 - Disclosure - Note 10 - Property, Plant and Equipment Sheet http://www.amsc.com/20260630/role/statement-note-10-property-plant-and-equipment Note 10 - Property, Plant and Equipment Notes 17 false false R18.htm 017 - Disclosure - Note 11 - Equity-Method Investments Sheet http://www.amsc.com/20260630/role/statement-note-11-equitymethod-investments Note 11 - Equity-Method Investments Notes 18 false false R19.htm 018 - Disclosure - Note 12 - Accounts Payable and Accrued Expenses Sheet http://www.amsc.com/20260630/role/statement-note-12-accounts-payable-and-accrued-expenses Note 12 - Accounts Payable and Accrued Expenses Notes 19 false false R20.htm 019 - Disclosure - Note 13 - Income Taxes Sheet http://www.amsc.com/20260630/role/statement-note-13-income-taxes Note 13 - Income Taxes Notes 20 false false R21.htm 020 - Disclosure - Note 14 - Contingent Consideration Sheet http://www.amsc.com/20260630/role/statement-note-14-contingent-consideration Note 14 - Contingent Consideration Notes 21 false false R22.htm 021 - Disclosure - Note 15 - Leases Sheet http://www.amsc.com/20260630/role/statement-note-15-leases- Note 15 - Leases Notes 22 false false R23.htm 022 - Disclosure - Note 16 - Commitments and Contingencies Sheet http://www.amsc.com/20260630/role/statement-note-16-commitments-and-contingencies Note 16 - Commitments and Contingencies Notes 23 false false R24.htm 023 - Disclosure - Note 17 - Business Segments Sheet http://www.amsc.com/20260630/role/statement-note-17-business-segments Note 17 - Business Segments Notes 24 false false R25.htm 024 - Disclosure - Note 18 - Recent Accounting Pronouncements Sheet http://www.amsc.com/20260630/role/statement-note-18-recent-accounting-pronouncements Note 18 - Recent Accounting Pronouncements Notes 25 false false R26.htm 025 - Disclosure - Note 19 - Subsequent Events Sheet http://www.amsc.com/20260630/role/statement-note-19-subsequent-events Note 19 - Subsequent Events Notes 26 false false R27.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 27 false false R28.htm 995472 - Disclosure - Note 2 - Acquisition (Tables) Sheet http://www.amsc.com/20260630/role/statement-note-2-acquisition-tables Note 2 - Acquisition (Tables) Tables http://www.amsc.com/20260630/role/statement-note-2-acquisition 28 false false R29.htm 995473 - Disclosure - Note 3 - Revenue Recognition (Tables) Sheet http://www.amsc.com/20260630/role/statement-note-3-revenue-recognition-tables Note 3 - Revenue Recognition (Tables) Tables http://www.amsc.com/20260630/role/statement-note-3-revenue-recognition 29 false false R30.htm 995474 - Disclosure - Note 4 - Stock-based Compensation (Tables) Sheet http://www.amsc.com/20260630/role/statement-note-4-stockbased-compensation-tables Note 4 - Stock-based Compensation (Tables) Tables http://www.amsc.com/20260630/role/statement-note-4-stockbased-compensation 30 false false R31.htm 995475 - Disclosure - Note 5 - Computation of Net Income Per Share of Common Stock (Tables) Sheet http://www.amsc.com/20260630/role/statement-note-5-computation-of-net-income-per-share-of-common-stock-tables Note 5 - Computation of Net Income Per Share of Common Stock (Tables) Tables http://www.amsc.com/20260630/role/statement-note-5-computation-of-net-income-per-share-of-common-stock 31 false false R32.htm 995476 - Disclosure - Note 6 - Goodwill and Other Intangibles (Tables) Sheet http://www.amsc.com/20260630/role/statement-note-6-goodwill-and-other-intangibles-tables Note 6 - Goodwill and Other Intangibles (Tables) Tables http://www.amsc.com/20260630/role/statement-note-6-goodwill-and-other-intangibles 32 false false R33.htm 995477 - Disclosure - Note 7 - Fair Value Measurements (Tables) Sheet http://www.amsc.com/20260630/role/statement-note-7-fair-value-measurements-tables Note 7 - Fair Value Measurements (Tables) Tables http://www.amsc.com/20260630/role/statement-note-7-fair-value-measurements 33 false false R34.htm 995478 - Disclosure - Note 8 - Accounts Receivable (Tables) Sheet http://www.amsc.com/20260630/role/statement-note-8-accounts-receivable-tables Note 8 - Accounts Receivable (Tables) Tables http://www.amsc.com/20260630/role/statement-note-8-accounts-receivable 34 false false R35.htm 995479 - Disclosure - Note 9 - Inventory (Tables) Sheet http://www.amsc.com/20260630/role/statement-note-9-inventory-tables Note 9 - Inventory (Tables) Tables http://www.amsc.com/20260630/role/statement-note-9-inventory 35 false false R36.htm 995480 - Disclosure - Note 10 - Property, Plant and Equipment (Tables) Sheet http://www.amsc.com/20260630/role/statement-note-10-property-plant-and-equipment-tables Note 10 - Property, Plant and Equipment (Tables) Tables http://www.amsc.com/20260630/role/statement-note-10-property-plant-and-equipment 36 false false R37.htm 995481 - Disclosure - Note 11 - Equity-Method Investments (Tables) Sheet http://www.amsc.com/20260630/role/statement-note-11-equitymethod-investments-tables Note 11 - Equity-Method Investments (Tables) Tables http://www.amsc.com/20260630/role/statement-note-11-equitymethod-investments 37 false false R38.htm 995482 - Disclosure - Note 12 - Accounts Payable and Accrued Expenses (Tables) Sheet http://www.amsc.com/20260630/role/statement-note-12-accounts-payable-and-accrued-expenses-tables Note 12 - Accounts Payable and Accrued Expenses (Tables) Tables http://www.amsc.com/20260630/role/statement-note-12-accounts-payable-and-accrued-expenses 38 false false R39.htm 995483 - Disclosure - Note 14 - Contingent Consideration (Tables) Sheet http://www.amsc.com/20260630/role/statement-note-14-contingent-consideration-tables Note 14 - Contingent Consideration (Tables) Tables http://www.amsc.com/20260630/role/statement-note-14-contingent-consideration 39 false false R40.htm 995484 - Disclosure - Note 15 - Leases (Tables) Sheet http://www.amsc.com/20260630/role/statement-note-15-leases-tables Note 15 - Leases (Tables) Tables http://www.amsc.com/20260630/role/statement-note-15-leases- 40 false false R41.htm 995485 - Disclosure - Note 17 - Business Segments (Tables) Sheet http://www.amsc.com/20260630/role/statement-note-17-business-segments-tables Note 17 - Business Segments (Tables) Tables http://www.amsc.com/20260630/role/statement-note-17-business-segments 41 false false R42.htm 995486 - Disclosure - Note 2 - Acquisition 1 (Details Textual) Sheet http://www.amsc.com/20260630/role/statement-note-2-acquisition-1-details-textual Note 2 - Acquisition 1 (Details Textual) Details http://www.amsc.com/20260630/role/statement-note-2-acquisition-tables 42 false false R43.htm 995487 - Disclosure - Note 2 - Acquisition 2 (Details Textual) Sheet http://www.amsc.com/20260630/role/statement-note-2-acquisition-2-details-textual Note 2 - Acquisition 2 (Details Textual) Details http://www.amsc.com/20260630/role/statement-note-2-acquisition-tables 43 false false R44.htm 995488 - Disclosure - Note 2 - Acquisition - Schedule of Business Acquisitions (Details) Sheet http://www.amsc.com/20260630/role/statement-note-2-acquisition-schedule-of-business-acquisitions-details Note 2 - Acquisition - Schedule of Business Acquisitions (Details) Details 44 false false R45.htm 995489 - Disclosure - Note 2 - Acquisition - Schedule of Business Acquisitions (Details) (Parentheticals) Sheet http://www.amsc.com/20260630/role/statement-note-2-acquisition-schedule-of-business-acquisitions-details-parentheticals Note 2 - Acquisition - Schedule of Business Acquisitions (Details) (Parentheticals) Details 45 false false R46.htm 995490 - Disclosure - Note 2 - Acquisition - Assets Acquired and Liabilities Assumed (Details) Sheet http://www.amsc.com/20260630/role/statement-note-2-acquisition-assets-acquired-and-liabilities-assumed-details Note 2 - Acquisition - Assets Acquired and Liabilities Assumed (Details) Details 46 false false R47.htm 995491 - Disclosure - Note 2 - Acquisition - Pro Forma Information (Details) Sheet http://www.amsc.com/20260630/role/statement-note-2-acquisition-pro-forma-information-details Note 2 - Acquisition - Pro Forma Information (Details) Details 47 false false R48.htm 995492 - Disclosure - Note 3 - Revenue Recognition 1 (Details Textual) Sheet http://www.amsc.com/20260630/role/statement-note-3-revenue-recognition-1-details-textual Note 3 - Revenue Recognition 1 (Details Textual) Details http://www.amsc.com/20260630/role/statement-note-3-revenue-recognition-tables 48 false false R49.htm 995493 - Disclosure - Note 3 - Revenue Recognition 2 (Details Textual) Sheet http://www.amsc.com/20260630/role/statement-note-3-revenue-recognition-2-details-textual Note 3 - Revenue Recognition 2 (Details Textual) Details http://www.amsc.com/20260630/role/statement-note-3-revenue-recognition-tables 49 false false R50.htm 995494 - Disclosure - Note 3 - Revenue Recognition - Disaggregation of Revenue (Details) Sheet http://www.amsc.com/20260630/role/statement-note-3-revenue-recognition-disaggregation-of-revenue-details Note 3 - Revenue Recognition - Disaggregation of Revenue (Details) Details 50 false false R51.htm 995495 - Disclosure - Note 3 - Revenue Recognition - Contract Assets and Liabilities (Details) Sheet http://www.amsc.com/20260630/role/statement-note-3-revenue-recognition-contract-assets-and-liabilities-details Note 3 - Revenue Recognition - Contract Assets and Liabilities (Details) Details 51 false false R52.htm 995496 - Disclosure - Note 3 - Revenue Recognition - Revenues by Major Customers (Details) Sheet http://www.amsc.com/20260630/role/statement-note-3-revenue-recognition-revenues-by-major-customers-details Note 3 - Revenue Recognition - Revenues by Major Customers (Details) Details 52 false false R53.htm 995497 - Disclosure - Note 4 - Stock-based Compensation (Details Textual) Sheet http://www.amsc.com/20260630/role/statement-note-4-stockbased-compensation-details-textual Note 4 - Stock-based Compensation (Details Textual) Details http://www.amsc.com/20260630/role/statement-note-4-stockbased-compensation-tables 53 false false R54.htm 995498 - Disclosure - Note 4 - Stock-based Compensation - Stock-based Compensation Expense by Financial Statement Line Item (Details) Sheet http://www.amsc.com/20260630/role/statement-note-4-stockbased-compensation-stockbased-compensation-expense-by-financial-statement-line-item-details Note 4 - Stock-based Compensation - Stock-based Compensation Expense by Financial Statement Line Item (Details) Details 54 false false R55.htm 995499 - Disclosure - Note 4 - Stock-based Compensation - Stock-based Compensation Expense by Financial Statement Line Item 2 (Details) Sheet http://www.amsc.com/20260630/role/statement-note-4-stockbased-compensation-stockbased-compensation-expense-by-financial-statement-line-item-2-details Note 4 - Stock-based Compensation - Stock-based Compensation Expense by Financial Statement Line Item 2 (Details) Details 55 false false R56.htm 995500 - Disclosure - Note 4 - Stock-based Compensation - Weighted Average Assumptions Used in The Black Scholes Valuation Model (Details) Sheet http://www.amsc.com/20260630/role/statement-note-4-stockbased-compensation-weighted-average-assumptions-used-in-the-black-scholes-valuation-model-details Note 4 - Stock-based Compensation - Weighted Average Assumptions Used in The Black Scholes Valuation Model (Details) Details 56 false false R57.htm 995501 - Disclosure - Note 5 - Computation of Net Income Per Share of Common Stock (Details Textual) Sheet http://www.amsc.com/20260630/role/statement-note-5-computation-of-net-income-per-share-of-common-stock-details-textual Note 5 - Computation of Net Income Per Share of Common Stock (Details Textual) Details http://www.amsc.com/20260630/role/statement-note-5-computation-of-net-income-per-share-of-common-stock-tables 57 false false R58.htm 995502 - Disclosure - Note 5 - Computation of Net Income Per Share of Common Stock - Reconciliation of Numerators and Denominators of EPS Calculation (Details) Sheet http://www.amsc.com/20260630/role/statement-note-5-computation-of-net-income-per-share-of-common-stock-reconciliation-of-numerators-and-denominators-of-eps-calculation-details Note 5 - Computation of Net Income Per Share of Common Stock - Reconciliation of Numerators and Denominators of EPS Calculation (Details) Details 58 false false R59.htm 995503 - Disclosure - Note 6 - Goodwill and Other Intangibles (Details Textual) Sheet http://www.amsc.com/20260630/role/statement-note-6-goodwill-and-other-intangibles-details-textual Note 6 - Goodwill and Other Intangibles (Details Textual) Details http://www.amsc.com/20260630/role/statement-note-6-goodwill-and-other-intangibles-tables 59 false false R60.htm 995504 - Disclosure - Note 6 - Goodwill and Other Intangibles - Schedule of Goodwill (Details) Sheet http://www.amsc.com/20260630/role/statement-note-6-goodwill-and-other-intangibles-schedule-of-goodwill-details Note 6 - Goodwill and Other Intangibles - Schedule of Goodwill (Details) Details 60 false false R61.htm 995505 - Disclosure - Note 6 - Goodwill and Other Intangibles - Intangible Assets (Details) Sheet http://www.amsc.com/20260630/role/statement-note-6-goodwill-and-other-intangibles-intangible-assets-details Note 6 - Goodwill and Other Intangibles - Intangible Assets (Details) Details 61 false false R62.htm 995506 - Disclosure - Note 6 - Goodwill and Other Intangibles - Expected Future Amortization Expense (Details) Sheet http://www.amsc.com/20260630/role/statement-note-6-goodwill-and-other-intangibles-expected-future-amortization-expense-details Note 6 - Goodwill and Other Intangibles - Expected Future Amortization Expense (Details) Details 62 false false R63.htm 995507 - Disclosure - Note 7 - Fair Value Measurements (Details Textual) Sheet http://www.amsc.com/20260630/role/statement-note-7-fair-value-measurements-details-textual Note 7 - Fair Value Measurements (Details Textual) Details http://www.amsc.com/20260630/role/statement-note-7-fair-value-measurements-tables 63 false false R64.htm 995508 - Disclosure - Note 7 - Fair Value Measurements - Assets and Liabilities Carried at Fair Value on a Recurring Basis (Details) Sheet http://www.amsc.com/20260630/role/statement-note-7-fair-value-measurements-assets-and-liabilities-carried-at-fair-value-on-a-recurring-basis-details Note 7 - Fair Value Measurements - Assets and Liabilities Carried at Fair Value on a Recurring Basis (Details) Details 64 false false R65.htm 995509 - Disclosure - Note 7 - Fair Value Measurements - Derivative Liability Measured at Fair Value (Details) Sheet http://www.amsc.com/20260630/role/statement-note-7-fair-value-measurements-derivative-liability-measured-at-fair-value-details Note 7 - Fair Value Measurements - Derivative Liability Measured at Fair Value (Details) Details 65 false false R66.htm 995510 - Disclosure - Note 8 - Accounts Receivable - Summary of Accounts Receivable (Details) Sheet http://www.amsc.com/20260630/role/statement-note-8-accounts-receivable-summary-of-accounts-receivable-details Note 8 - Accounts Receivable - Summary of Accounts Receivable (Details) Details 66 false false R67.htm 995511 - Disclosure - Note 9 - Inventory (Details Textual) Sheet http://www.amsc.com/20260630/role/statement-note-9-inventory-details-textual Note 9 - Inventory (Details Textual) Details http://www.amsc.com/20260630/role/statement-note-9-inventory-tables 67 false false R68.htm 995512 - Disclosure - Note 9 - Inventory - Summary of Net Inventory (Details) Sheet http://www.amsc.com/20260630/role/statement-note-9-inventory-summary-of-net-inventory-details Note 9 - Inventory - Summary of Net Inventory (Details) Details 68 false false R69.htm 995513 - Disclosure - Note 10 - Property, Plant and Equipment (Details Textual) Sheet http://www.amsc.com/20260630/role/statement-note-10-property-plant-and-equipment-details-textual Note 10 - Property, Plant and Equipment (Details Textual) Details http://www.amsc.com/20260630/role/statement-note-10-property-plant-and-equipment-tables 69 false false R70.htm 995514 - Disclosure - Note 10 - Property, Plant and Equipment - Cost and Accumulated Depreciation of Property and Equipment (Details) Sheet http://www.amsc.com/20260630/role/statement-note-10-property-plant-and-equipment-cost-and-accumulated-depreciation-of-property-and-equipment-details Note 10 - Property, Plant and Equipment - Cost and Accumulated Depreciation of Property and Equipment (Details) Details 70 false false R71.htm 995515 - Disclosure - Note 11 - Equity-Method Investments (Details Textual) Sheet http://www.amsc.com/20260630/role/statement-note-11-equitymethod-investments-details-textual Note 11 - Equity-Method Investments (Details Textual) Details http://www.amsc.com/20260630/role/statement-note-11-equitymethod-investments-tables 71 false false R72.htm 995516 - Disclosure - Note 11 - Equity-Method Investments - Schedule of Equity Method Investment Summarized Financial Information (Details) Sheet http://www.amsc.com/20260630/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 72 false false R73.htm 995517 - Disclosure - Note 12 - Accounts Payable and Accrued Expenses (Details Textual) Sheet http://www.amsc.com/20260630/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/20260630/role/statement-note-12-accounts-payable-and-accrued-expenses-tables 73 false false R74.htm 995518 - Disclosure - Note 12 - Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Details) Sheet http://www.amsc.com/20260630/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 74 false false R75.htm 995519 - Disclosure - Note 12 - Accounts Payable and Accrued Expenses - Product Warranty Activity (Details) Sheet http://www.amsc.com/20260630/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 75 false false R76.htm 995520 - Disclosure - Note 13 - Income Taxes (Details Textual) Sheet http://www.amsc.com/20260630/role/statement-note-13-income-taxes-details-textual Note 13 - Income Taxes (Details Textual) Details http://www.amsc.com/20260630/role/statement-note-13-income-taxes 76 false false R77.htm 995521 - Disclosure - Note 14 - Contingent Consideration (Details Textual) Sheet http://www.amsc.com/20260630/role/statement-note-14-contingent-consideration-details-textual Note 14 - Contingent Consideration (Details Textual) Details http://www.amsc.com/20260630/role/statement-note-14-contingent-consideration-tables 77 false false R78.htm 995522 - Disclosure - Note 14 - Contingent Consideration - Summary of the Key Assumptions Used to Calculate Fair Value of Warrants (Details) Sheet http://www.amsc.com/20260630/role/statement-note-14-contingent-consideration-summary-of-the-key-assumptions-used-to-calculate-fair-value-of-warrants-details Note 14 - Contingent Consideration - Summary of the Key Assumptions Used to Calculate Fair Value of Warrants (Details) Details 78 false false R79.htm 995523 - Disclosure - Note 15 - Leases (Details Textual) Sheet http://www.amsc.com/20260630/role/statement-note-15-leases-details-textual Note 15 - Leases (Details Textual) Details http://www.amsc.com/20260630/role/statement-note-15-leases-tables 79 false false R80.htm 995524 - Disclosure - Note 15 - Leases - Operating Lease Assets and Liabilities (Details) Sheet http://www.amsc.com/20260630/role/statement-note-15-leases-operating-lease-assets-and-liabilities-details Note 15 - Leases - Operating Lease Assets and Liabilities (Details) Details 80 false false R81.htm 995525 - Disclosure - Note 15 - Leases - Lease Cost (Details) Sheet http://www.amsc.com/20260630/role/statement-note-15-leases-lease-cost-details Note 15 - Leases - Lease Cost (Details) Details 81 false false R82.htm 995526 - Disclosure - Note 15 - Leases - Minimum Future Lease Obligation (Details) Sheet http://www.amsc.com/20260630/role/statement-note-15-leases-minimum-future-lease-obligation-details Note 15 - Leases - Minimum Future Lease Obligation (Details) Details 82 false false R83.htm 995527 - Disclosure - Note 16 - Commitments and Contingencies (Details Textual) Sheet http://www.amsc.com/20260630/role/statement-note-16-commitments-and-contingencies-details-textual Note 16 - Commitments and Contingencies (Details Textual) Details http://www.amsc.com/20260630/role/statement-note-16-commitments-and-contingencies 83 false false R84.htm 995528 - Disclosure - Note 17 - Business Segments (Details Textual) Sheet http://www.amsc.com/20260630/role/statement-note-17-business-segments-details-textual Note 17 - Business Segments (Details Textual) Details http://www.amsc.com/20260630/role/statement-note-17-business-segments-tables 84 false false R85.htm 995529 - Disclosure - Note 17 - Business Segments - Operating Results for Business Segments (Details) Sheet http://www.amsc.com/20260630/role/statement-note-17-business-segments-operating-results-for-business-segments-details Note 17 - Business Segments - Operating Results for Business Segments (Details) Details 85 false false R86.htm 995530 - Disclosure - Note 17 - Business Segments - Total Business Segments Assets (Details) Sheet http://www.amsc.com/20260630/role/statement-note-17-business-segments-total-business-segments-assets-details Note 17 - Business Segments - Total Business Segments Assets (Details) Details 86 false false All Reports Book All Reports amsc-20260630.xsd amsc-20260630_cal.xml amsc-20260630_def.xml amsc-20260630_lab.xml amsc-20260630_pre.xml amsc20260630_10q.htm http://fasb.org/us-gaap/2026 http://xbrl.sec.gov/dei/2026 http://xbrl.sec.gov/ecd/2026 true true