Document And Entity Information
Intangible assets
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived
Dividend yield
Note To Financial Statement Details Textual
Note 2 - Acquisition
Note 3 - Revenue Recognition
Note 4 - Stock-based Compensation
Risk-free interest rate
Note 5 - Computation of Net Income Per Share of Common Stock
Note 6 - Goodwill and Other Intangibles
Note 7 - Fair Value Measurements
Note 8 - Accounts Receivable
Expected volatility
Note 9 - Inventory
Prepaid expenses and other current assets
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets
Note 10 - Property, Plant and Equipment
Accounts receivable
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
Income Tax Disclosure [Text Block]
Note 11 - Equity-method Investments
Note 12 - Accounts Payable and Accrued Expenses
Note 14 - Contingent Consideration
Cash and cash equivalents
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
Note 16 - Leases
Inventory
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
Note 18 - Business Segments
us-gaap_LiabilitiesCurrent
Total current liabilities
Note 2 - Acquisition - Schedule of Business Acquisitions (Details)
Note 2 - Acquisition - Schedule of Business Acquisitions (Details) (Parentheticals)
Note 2 - Acquisition - Assets Acquired and Liabilities Assumed (Details)
Note 2 - Acquisition - Pro Forma Information (Details)
Expected life (years) (Year)
Issuance of 2,417,142 shares of Company’s common stock
Note 3 - Revenue Recognition - Disaggregation of Revenue (Details)
Note 3 - Revenue Recognition - Contract Assets and Liabilities (Details)
us-gaap_BusinessCombinationConsiderationTransferred1
Business Combination, Consideration Transferred
Total consideration
Note 3 - Revenue Recognition - Revenues by Major Customers (Details)
Note 4 - Stock-based Compensation - Stock-based Compensation Expense by Financial Statement Line Item (Details)
Note 4 - Stock-based Compensation - Weighted Average Assumptions Used in The Black Scholes Valuation Model (Details)
us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Month)
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Note 5 - Computation of Net Income Per Share of Common Stock - Reconciliation of Numerators and Denominators of EPS Calculation (Details)
Note 6 - Goodwill and Other Intangibles - Schedule of Goodwill (Details)
Contingent consideration
us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
Note 6 - Goodwill and Other Intangibles - Intangible Assets (Details)
Note 6 - Goodwill and Other Intangibles - Expected Future Amortization Expense (Details)
Note 7 - Fair Value Measurements - Assets and Liabilities Carried at Fair Value on a Recurring Basis (Details)
us-gaap_LiabilityForUncertainTaxPositionsCurrent
Liability for Uncertainty in Income Taxes, Current
Note 7 - Fair Value Measurements - Derivative Liability Measured at Fair Value (Details)
Note 8 - Accounts Receivable - Summary of Accounts Receivable (Details)
us-gaap_BusinessAcquisitionSharePrice
Business Combination, Price Per Share (in dollars per share)
Note 9 - Inventory - Summary of Net Inventory (Details)
Note 10 - Property, Plant and Equipment - Cost and Accumulated Depreciation of Property and Equipment (Details)
Note 11 - Equity-Method Investments - Schedule of Equity Method Investment Summarized Financial Information (Details)
Note 12 - Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Details)
us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic
Basic (in dollars per share)
Note 12 - Accounts Payable and Accrued Expenses - Product Warranty Activity (Details)
us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax
Foreign currency translation gain
Note 14 - Contingent Consideration - Summary of the Key Assumptions Used to Calculate Fair Value of Warrants (Details)
Cumulative translation adjustment
Cumulative translation adjustment
Note 16 - Leases - Operating Lease Assets and Liabilities (Details)
Note 16 - Leases - Lease Cost (Details)
Note 16 - Leases - Minimum Future Lease Obligation (Details)
Debt, current portion
Debt, Current
Note 18 - Business Segments - Operating Results for Business Segments (Details)
Note 18 - Business Segments - Total Business Segments Assets (Details)
us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted
Diluted (in dollars per share)
Notes To Financial Statements
Notes To Financial Statements [Abstract]
Business Combination, Pro Forma Information [Table]
Customer Relationship, Core Technology and Know-how [Member]
Represents information pertaining to customer relationship, core technology and know-how intangible assets.
us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
Net income
Business Combination, Pro Forma Information [Table Text Block]
Business Combination, Contingent Consideration, Liability, Measurement Input
Financial Instruments [Domain]
amsc_RevenueFromContractWithCustomerProductsOnHold
Revenue from Contract with Customer, Products on Hold
Amount of revenue collected from customer for products currently on hold.
Accounts payable and accrued expenses
Total
Deferred revenue, current portion
Financial Instrument [Axis]
Goodwill and Intangible Assets Disclosure [Text Block]
Schedule of Goodwill [Table Text Block]
Goodwill [Table]
Accrued compensation
Income taxes payable
Lessee, Operating Leases [Text Block]
Accounts payable
Postemployment Retirement Benefits [Member]
Retirement Plan Type [Axis]
Retirement Plan Type [Domain]
Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block]
Accrued other miscellaneous expenses
us-gaap_PolicyTextBlockAbstract
Accounting Policies
Accrued product warranty
Trade Names [Member]
Accrued commissions
Issuance of common stock
Indefinite-Lived Intangible Assets [Axis]
Indefinite-Lived Intangible Assets, Major Class Name [Domain]
Equity-method investments
amsc_BusinessCombinationRecognizedAssetAcquiredEquityMethodInvestments
Amount of equity method investments acquired at the acquisition date.
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Purchases of property, plant and equipment
Non-cash investing and financing activities
us-gaap_WeightedAverageNumberOfSharesCommonStockSubjectToRepurchaseOrCancellation
Weighted-average shares subject to repurchase (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)
Cash paid for income taxes, net of refunds
Weighted-average shares of common stock outstanding (in shares)
us-gaap_WeightedAverageNumberOfSharesIssuedBasic
Current liabilities:
amsc_BusinessCombinationProFormaInformationProFormaNetRevenue
Net Revenue
Amount of pro forma net revenue of combined entity as if acquisition date of business combination occurred as of beginning of period.
Operating leases
Total assets
Total assets
Supplemental schedule of cash flow information:
Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
us-gaap_PaymentsToAcquireRealEstate
Payments to Acquire Real Estate
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)
Customer Relationships [Member]
Deferred tax assets, long-term portion
Comtrafo Acquisition [Member]
Represents the Comtrafo Acquisition.
Finite-Lived Intangible Assets by Major Class [Axis]
Share-Based Payment Arrangement [Text Block]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
Business Combination, Contingent Consideration [Table]
Business Combination, Contingent Consideration, Type [Axis]
Business Combination, Contingent Consideration, Type [Domain]
Award Type [Domain]
Restricted cash
Net income
Net income
Net Income (Loss) Attributable to Parent
Net income
Award Type [Axis]
us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
BacklogAccumulated Amortization
us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsRevenuesAndGainsRecognized
Business Combination, Separately Recognized Transactions, Revenues and Gains Recognized
Net Book Value
us-gaap_FiniteLivedIntangibleAssetsNet
Total
Intangibles, net
Intangible assets, net
Gross Amount
us-gaap_FiniteLivedIntangibleAssetsGross
Restricted Stock [Member]
Performance Shares [Member]
Share-Based Payment Arrangement, Option [Member]
Currency translation adjustment
Balance acquired - Comtrafo
Goodwill, Acquired During Period
Thereafter
Amount of lessee's undiscounted obligation for lease payment for operating lease due after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
Indefinite life intangible assets
us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Business Combination [Text Block]
Commitments and Contingencies Disclosure [Text Block]
Business Combination [Table Text Block]
Property, plant and equipment, net
us-gaap_PropertyPlantAndEquipmentNet
Business Combination [Table]
Goodwill
Goodwill
Goodwill
Goodwill
Issuance of common stock to settle contingent consideration
Value of stock issued to settle contingent consideration.
Issuance of common stock to settle contingent consideration (in shares)
Number of shares of stock issued during the period to settle contingent consideration.
us-gaap_EquityMethodInvestmentOwnershipPercentage
Equity Method Investment, Ownership Percentage
Northeast Power Systems, Inc (NEPSI) [Member]
Represents Northeast Power Systems, Inc (NEPSI).
amsc_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHighNumberOfShares
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High, Number of Shares (in shares)
For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid in shares.
Megatran Acquisition [Member]
Represents information pertaining to the Megatran Acquisition.
Cash flows from investing activities:
Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table]
Net income per share of common stock
Earnings Per Share [Text Block]
BRAZIL
us-gaap_IncomeLossFromEquityMethodInvestments
Earnings from equity method investments
us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Accounts payable and accrued expenses
us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
Income from operation
Equity-method investments
Equity Method Investments
Income tax benefit
Income Tax Expense (Benefit)
us-gaap_OperatingExpenses
Total operating expenses
Restricted cash
us-gaap_RestrictedCashAndCashEquivalentsNoncurrent
Restricted Cash and Cash Equivalent, Noncurrent
us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue
Restricted Cash and Cash Equivalent, Current
amsc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccountsPayableAndAccruedExpenses
Accounts payable and accrued expenses
Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables as well as accrued expenses, assumed at the acquisition date.
Cash and cash equivalents
amsc_BusinessCombinationContingentConsiderationArrangementsPaymentsToSettleRemainingObligations
Business Combination, Contingent Consideration Arrangements, Payments to Settle Remaining Obligations
Represents the payments to settle remaining obligations from a contingent consideration arrangement resulting from a business combination.
amsc_BusinessCombinationContingentConsiderationArrangementsRemainingObligationToStockholders
Business Combination, Contingent Consideration Arrangements, Remaining Obligation to Stockholders
Represents the remaining obligation to stockholders from a contingent consideration arrangement from a business combination.
Total stock-based compensation expense
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
Change in fair value
NWL Pacific Inc. Co., LTD [Member]
Represents information pertaining to NWL Pacific Inc. Co., LTD.
Amendment Flag
us-gaap_ComprehensiveIncomeNetOfTax
Comprehensive income
City Area Code
us-gaap_IncreaseDecreaseInContractWithCustomerLiability
Deferred revenue
Common stock, shares outstanding (in shares)
Balance (in shares)
Balance (in shares)
Current Fiscal Year End Date
Operating lease costs – variable
us-gaap_LeaseCost
Total lease costs
Consolidation, Less-than-Wholly-Owned Subsidiary, Parent Ownership Interest, Effect of Change [Table]
us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Prepaid expenses and other assets
Weighted-average discount rate
Document Fiscal Period Focus
Operating lease costs – fixed
Document Fiscal Year Focus
Short-term lease costs
Lease, Cost [Table Text Block]
Document Period End Date
Right-of-use assets obtained in exchange for new lease obligations
Weighted-average remaining lease term (Year)
Entity File Number
Entity Emerging Growth Company
Document Type
Proceeds from exercise of employee stock options and ESPP
Represents the proceeds from stock options and stock plans exercised.
Entity Small Business
Inox Wind Limited [Member]
Represents information pertaining to Inox Wind Limited.
Entity Shell Company
Document Information [Line Items]
Document Information [Table]
Interim Period, Costs Not Allocable [Table]
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
Balance
Balance
Entity Filer Category
Entity Current Reporting Status
us-gaap_BusinessCombinationAcquisitionRelatedCosts
Business Combination, Acquisition-Related Cost, Expense
amsc_RevenuePerformanceObligationSatisfiedRevenueRecognizedPercentage
Revenue, Performance Obligation Satisfied, Revenue Recognized, Percentage
Represents the percentage of revenue recognized at the point of time when control transferred to the customer.
Issuance of contingent consideration
amsc_ExtendedServiceWarrantyTerm
Extended Service Warranty, Term (Year)
Represents the additional term of extended service-type warranties.
amsc_WarrantyPeriod
Warranty Period (Year)
Represents the typical term of assurance-type warranties on all product sales.
us-gaap_GoodwillImpairmentLoss
Goodwill, Impairment Loss
Schedule of Long-Term Debt Instruments [Table]
us-gaap_IncreaseDecreaseInAccountsReceivable
Accounts receivable
Stock-based compensation expense
Concentration percentage
Statement of Comprehensive Income [Abstract]
Entity Tax Identification Number
Entity Central Index Key
amsc_ContractWithCustomerPaymentTerm
Contract with Customer, Payment Term (Day)
Represents the payment term, from the date of delivery, under contracts with customers.
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
Depreciation and amortization
Entity Registrant Name
Liability Class [Axis]
Fair Value by Liability Class [Domain]
Entity [Domain]
Customer Concentration Risk [Member]
Legal Entity [Axis]
Entity Address, Address Line One
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
Grid [Member]
Represents information pertaining to the Grid segment.
us-gaap_AmortizationOfIntangibleAssets
Amortization of Intangible Assets
ecd_NonRule10b51ArrTrmntdFlag
Non-Rule 10b5-1 Arrangement Terminated [Flag]
us-gaap_TreasuryStockValueAcquiredCostMethod
Repurchase of treasury stock
Services and Technology Development [Member]
Represents information pertaining to services and technology development.
Entity Address, City or Town
ecd_Rule10b51ArrTrmntdFlag
Rule 10b5-1 Arrangement Terminated [Flag]
Equipment and Systems [Member]
Represents information pertaining to equipment and systems.
Amortization of acquisition-related intangibles
ecd_Rule10b51ArrAdoptedFlag
Rule 10b5-1 Arrangement Adopted [Flag]
Entity Address, Postal Zip Code
Entity Address, State or Province
ecd_NonRule10b51ArrAdoptedFlag
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Deferred program costs
Amount after valuation and LIFO reserves, and progress payments, of inventory associated with long-term contracts, expected to be sold, or consumed within one year or operating cycle, if longer.
Concentration Risk Type [Axis]
Material Terms of Trading Arrangement [Text Block]
Wind [Member]
Represents information pertaining to the Wind segment.
us-gaap_TreasuryStockValue
Treasury stock, at cost, 403,351 at December 31, 2025 and March 31, 2025
Concentration Risk Type [Domain]
Entity Common Stock, Shares Outstanding
Trading Arrangements, by Individual [Table]
Accrued contract loss
represents the accrued contract loss.
Revenue Benchmark [Member]
Proceeds from public equity offering, net of offering expenses
Represents the proceeds from equity offerings.
us-gaap_IncreaseDecreaseInInventories
Inventory
Trading Symbol
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Issuance of common stock - Comtrafo acquisition, net of offering expenses (in shares)
amsc_ContractWithCustomerAssetDeferredProgramCostsNet
Deferred program costs, ending balance
Deferred program costs, ending balance
Represents the net deferred program costs related to contract with customer.
amsc_ContractWithCustomerAssetUnbilledARNet
Unbilled AR, ending balance
Unbilled AR, ending balance
Represents the net unbilled AR related to contract with customer.
Increases for costs incurred to fulfill performance obligations
Represents the change in contract costs attributable to deferred program costs related to contract with customer.
Issuance of common stock – ESPP (in shares)
Issuance of common stock for 401(k) match
Local Phone Number
Issuance of common stock for 401(k) match (in shares)
Issuance of common stock - Comtrafo acquisition, net of offering expenses
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations
Represents the change in the asset from the contract with customer from revenue recognized on unbilled accounts receivable.
Exercise of stock options (in shares)
us-gaap_TableTextBlock
Notes Tables
Decrease due to cost recognition on completed performance obligations
Represents the amount of contract costs recognized from deferred program costs, with regard to asset from contract with customer.
amsc_ContractWithCustomerAssetUnbilledARChangeInTimeFramePerformanceObligationSatisfiedRevenueRecognized
Increase (decrease) due to customer billings
Represents the revenue recognized from performance obligation satisfied from change in time frame of unbilled AR related to contract with customer.
Issuance of common stock – ESPP
Contract liabilities, other changes and FX impact
Represents other changes in the liability from contract with customer.
Deferred program costs, other changes and FX impact
Represents the change in the asset from contract with customer, attributable to other changes in deferred program costs.
Unbilled AR, other changes and FX impact
Represents changes in the asset from contract with customer from other changes pertaining to unbilled accounts receivable.
Issuance of common stock – restricted shares, net of forfeited shares (in shares)
Exercise of stock options
Issuance of common stock – restricted shares, net of forfeited shares
us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture (in shares)
Selling, general and administrative
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)
Raw materials
Segment other operating expenses
us-gaap_LiabilitiesAndStockholdersEquity
Total liabilities and stockholders' equity
Finished goods
Work-in-process
Reported Value Measurement [Member]
UNITED STATES
Measurement Input, Credit Spread [Member]
Accumulated deficit
Research and development
Thereafter
amsc_FinitelivedIntangibleAssetExpectedAmortizationAfterYearFour
Amount of amortization for asset, excluding financial asset and goodwill, lacking physical substance with finite life expected to be recognized after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
Accumulated other comprehensive income (loss)
Backlog [Member]
Represents the information pertaining to backlog.
Measurement Input, Share Price [Member]
Debt Disclosure [Text Block]
Changes in operating asset and liability accounts:
Measurement Input, EDITDA Continuous Risk Premium
Measurement input using revenue risk premium.
Measurement Input, Revenue Volatility [Member]
Measurement input using revenue volatility.
Measurement Input, Payment Delay [Member]
Measurement input using payment delay.
amsc_BusinessCombinationContingentConsiderationArrangementsNumberOfIssuableShares
Business Combination, Contingent Consideration Arrangements, Number of Issuable Shares (in shares)
The number of issuable shares for contingent consideration arrangements under business combinations.
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
us-gaap_OtherNoncashIncomeExpense
Other non-cash items
Inventory Disclosure [Text Block]
Lease liability, long-term portion
Lease liabilities – LT Operating
Schedule of Inventory, Current [Table Text Block]
Inventory, Current [Table]
Present value of lease liabilities
Subsequent Event [Table]
Lease liability, current portion
Lease liabilities – ST Operating
Subsequent Events [Text Block]
Right-of-use assets
Right-of-use assets – Operating
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Total minimum lease payments
us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
Less: interest
Deferred income taxes
Measurement Input Type [Axis]
2029
2026 (remaining)
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear
Measurement Input Type [Domain]
2030
2028
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2029
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2030
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2027
2028
Business Combination, Contingent Consideration [Text Block]
The entire disclosure for contingent consideration for business combination.
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
2027
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
amsc_OperatingAndFinanceLeaseRightofuseAsset
Total right-of-use assets
Amount of lessee's right to use underlying asset under both operating and finance lease.
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]
Other assets
us-gaap_ShareBasedCompensation
Stock-based compensation expense
2026 (remaining)
Estimated Useful Life (Year)
us-gaap_FiniteLivedIntangibleAssetUsefulLife
us-gaap_Revenues
Revenues
Operating expenses:
Intangible Asset, Finite-Lived [Table]
Schedule of Finite-Lived Intangible Assets [Table Text Block]
us-gaap_LesseeOperatingLeaseRenewalTerm
Lessee, Operating Lease, Renewal Term (Year)
Accounts Receivable [Text Block]
The entire disclosure for accounts receivable.
us-gaap_DepreciationDepletionAndAmortization
Depreciation, Depletion and Amortization
us-gaap_AssetsCurrent
Total current assets
Cash equivalents
Short-term cash instruments
Treasury stock, common shares (in shares)
us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease)
Interest income, net
Interest income, net
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
Common stock, $0.01 par value, 75,000,000 shares authorized; 48,015,636 and 39,887,536 shares issued and 47,612,285 and 39,484,185 shares outstanding at December 31, 2025 and March 31, 2025, respectively
Adjustments to reconcile net income to net cash provided by operations:
Measurement Frequency [Axis]
Measurement Frequency [Domain]
Fair Value, Recurring [Member]
Common stock, shares authorized (in shares)
Americas [Member]
Common stock, shares issued (in shares)
Common stock, par value (in dollars per share)
Asia Pacific [Member]
Statistical Measurement [Domain]
Lessee, Lease, Description [Table]
Maximum [Member]
Minimum [Member]
Product and Service [Axis]
Product and Service [Domain]
Statistical Measurement [Axis]
Investment, Name [Domain]
Investment, Name [Axis]
Property, Plant and Equipment Disclosure [Text Block]
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]
Geographical [Axis]
Property, Plant and Equipment [Table Text Block]
Geographical [Domain]
Inventory, net
Net inventory
Portion at Fair Value Measurement [Member]
Accrued inventories in-transit
Represents the amount of accrued inventories in transit, as of the balance sheet date.
Equipment and Software [Member]
Represents information pertaining to equipment and software.
Assets And Liabilities Lessee [Table Text Block]
Tabular disclosure of lessee's assets and liabilities.
EMEA [Member]
Revenues
Measurement Basis [Axis]
Fair Value, Inputs, Level 3 [Member]
Fair Value Hierarchy and NAV [Domain]
Customer [Axis]
Fair Value, Inputs, Level 1 [Member]
Customer [Domain]
Fair Value, Inputs, Level 2 [Member]
Reconciliation of Assets from Segment to Consolidated [Table Text Block]
Reconciliation of Assets from Segment to Consolidated [Table]
Fair Value Hierarchy and NAV [Axis]
us-gaap_ProductWarrantyAccrualPayments
Settlements during the period
Acquired warranty obligations
Provisions for warranties during the period
Construction in Progress [Member]
Cash flows from operating activities:
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Schedule of Segment Reporting Information, by Segment [Table]
Statement [Line Items]
us-gaap_NumberOfOperatingSegments
Number of Operating Segments
Accounts receivable, net
Accounts receivable
Furniture and Fixtures [Member]
us-gaap_NumberOfReportableSegments
Number of Reportable Segments
Building [Member]
Additional paid-in capital
AOCI Attributable to Parent [Member]
Schedule of Product Warranty Liability [Table Text Block]
Stockholders' equity:
Land [Member]
Leasehold Improvements [Member]
Property, Plant and Equipment [Table]
Other (expense)/income, net
Other (expense)/income, net
Long-Lived Tangible Asset [Axis]
Segment Reporting Disclosure [Text Block]
Long-Lived Tangible Asset [Domain]
Fair Value, by Balance Sheet Grouping [Table]
Current assets:
Fair Value Disclosures [Text Block]
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Cash, cash equivalents and restricted cash at beginning of period
Cash, cash equivalents and restricted cash at end of period
Effect of exchange rate changes on cash
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Net increase (decrease) in cash, cash equivalents and restricted cash
us-gaap_Liabilities
Total liabilities
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash provided by (used in) financing activities
Commitments and Contingencies (Note 17)
Increase (decrease) due to customer billings
Segment operating income
Operating income (loss)
Operating income (loss):
us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations
us-gaap_NetCashProvidedByUsedInOperatingActivities
Net cash provided by operating activities
Increase for balance acquired
Prepaid expenses and other current assets
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash used in investing activities
Cost of revenues
Cost of Revenue
us-gaap_GrossProfit
Gross profit
Gross margin
Consolidation Items [Domain]
Deferred tax liabilities, long-term portion
Provision for excess and obsolete inventory
Inventory Write-down
us-gaap_ContractWithCustomerLiability
Contract liabilities, ending balance
Contract liabilities, ending balance
Consolidation Items [Axis]
us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation
Employee taxes paid related to net settlement of equity awards
Equity Method Investment [Table]
Equity Method Investments and Joint Ventures Disclosure [Text Block]
Equity Method Investments [Table Text Block]
us-gaap_ProductWarrantyAccrual
Balance at beginning of period
Balance at end of period
Innomotics LLC [Member]
Represents Innomotics LLC.
Accounts receivable (billed)
us-gaap_PaymentsForRepurchaseOfCommonStock
Repurchase of treasury stock
Accounts Receivable [Table Text Block]
Tabular disclosure of accounts receivable.
Scenario [Domain]
Forecast [Member]
Retained Earnings [Member]
amsc_BusinessAcquisitionProFormaOperatingIncomeLoss
Operating income
The pro forma operating Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.
Scenario [Axis]
Treasury Stock, Common [Member]
Additional Paid-in Capital [Member]
Common Stock [Member]
Equity Components [Axis]
Equity Component [Domain]
us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)
us-gaap_RevenueRemainingPerformanceObligation
Revenue, Remaining Performance Obligation, Amount
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income (loss) before income tax benefit
Income (loss) before income tax benefit
Other comprehensive income, net of tax:
Short-term Cash Instruments [Member]
Represents Short-term Cash Instruments.
Disaggregation of Revenue [Table Text Block]
Disaggregation of Revenue [Table]
us-gaap_RepaymentsOfLongTermDebt
Repayment of debt
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]
Revenue from Contract with Customer [Text Block]
Total lease liabilities
Present value of lessee's discounted obligation for lease payments from operating and finance leases.
Document Quarterly Report
Entity Incorporation, State or Country Code
us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits
Accounting Policies [Abstract]
Document Transition Report
Selling, General and Administrative Expenses [Member]
Entity Interactive Data Current
Security Exchange Name
Title of 12(b) Security
Equity Method Investment, Nonconsolidated Investee [Axis]
Cost of Sales [Member]
Equity Method Investment, Nonconsolidated Investee [Domain]
Research and Development Expense [Member]
Statement of Income Location, Balance [Axis]
Statement of Income Location, Balance [Domain]
Advanced deposits
Accounts and Financing Receivables [Table]
Fuji Bridex Pte Ltd [Member]
Related to Fuji Bridex Pte Ltd.
Income Tax Contingency [Table]
Segments [Axis]
Segments [Domain]
us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)
Shares used in per-share calculation - diluted (in shares)
us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Diluted (in shares)
Accounts receivable (unbilled)
Statement [Table]
Core Technology and Know-how [Member]
Represents information pertaining to Core Technology and Know-how.
Statement of Financial Position [Abstract]
Net income per share - diluted (in dollars per share)
Diluted (in dollars per share)
Shares used in per-share calculation - basic (in shares)
us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Basic (in shares)
Accounts Payable and Accrued Liabilities Disclosure [Text Block]
Business Combination [Axis]
Net income per share - basic (in dollars per share)
Basic (in dollars per share)
Business Combination [Domain]
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]
Weighted average number of shares of common stock outstanding
Statement of Cash Flows [Abstract]
Statement of Stockholders' Equity [Abstract]
Income Statement [Abstract]
us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
Total other comprehensive gain, net of tax
Fair value (millions)
amsc_ExtendedWarrantyTriggerPeriod
Extended Warranty Trigger Period (Year)
The period in which customers may extend their warranty for an additional term.
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
Business Combination, Share Issued (in shares)
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)
us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentInventory
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory
Comtrafo Industria de Transformadores Eletricos S.A. (Comtrafo) [Member]
Represents information pertaining to Comtrafo Industria de Transformadores Eletricos S.A.
Accounting Standards Update and Change in Accounting Principle [Table]
Immediately Vested Common Stock [Member]
Represents common stock which is vested immediately upon issuance.
Accounting Standards Update and Change in Accounting Principle [Text Block]
Contingent consideration
Other Commitments [Table]
us-gaap_PaymentsForProceedsFromOtherInvestingActivities
Change in other assets
Cash flows from financing activities:
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Other liabilities
Measurement Input, EBITDA Continuous Risk Premium [Member]
Represents information pertaining to the EBITDA continuous risk premium measurement input.
amsc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDebt
Debt, current and long-term
Amount of debt recognized during or after the current normal operating cycle.
us-gaap_PaymentForContingentConsiderationLiabilityInvestingActivities
Cash paid to settle Megatran contingent consideration liability
amsc_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityForeignExchangeImpact
FX Impact
Amount of foreign exchange impact recognized from liability measured at fair value on recurring basis using unobservable input (level 3).
Measurement Input, EBITDA Volatility [Member]
Represents information pertaining to the EBITDA volatility measurement input.
us-gaap_BusinessCombinationAcquiredReceivablesGrossContractualAmount
Business Combination, Acquired Receivable, Purchased without Credit Deterioration, Gross Contractual Amount
us-gaap_BusinessCombinationAcquiredReceivablesEstimatedUncollectible
Business Combination, Acquired Receivable, Purchased without Credit Deterioration, Contractual Cash Flow, Estimated Uncollectible
amsc_BusinessAcquisitionProFormaSharesBasic
Shares - basic (in shares)
The pro forma basic shares for a period as if the business combination or combinations had been completed at the beginning of a period.
amsc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTangibleAssetsLiabilities
Net tangible assets/(liabilities)
Amount recognized as of the acquisition date for the identifiable tangible assets acquired in excess of (less than) the aggregate liabilities assumed.
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
us-gaap_BusinessCombinationAcquiredReceivablesFairValue
Business Combination, Acquired Receivable, Purchased without Credit Deterioration, Fair Value
Megatran [Member]
Related to Megatran.
amsc_BusinessAcquisitionProFormaSharesDiluted
Shares - diluted (in shares)
The pro forma diluted shares for a period as if the business combination or combinations had been completed at the beginning of a period.
amsc_IncreaseDecreaseInNoncashIncomeTaxBenefitRegardingValuationAllowance
Increase Decrease in Non-cash Income Tax Benefit Regarding Valuation Allowance
The increase or decrease in the non-cash income tax benefit from changes in valuation allowance.
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
Total purchase consideration
Deferred revenue, long-term portion
us-gaap_StockholdersEquity
Total stockholders' equity
Balance
Balance
Amortization of operating lease right-of-use assets
us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Cash paid for acquisition, net of cash acquired
us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
Property, plant and equipment, net
us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization
Less accumulated depreciation
Class of Stock [Axis]
Debt, long-term portion
Long-Term Debt, Excluding Current Maturities
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities
Deferred tax liability
Property, plant and equipment, gross
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue
Deferred revenue
Cash payments
Payments to Acquire Businesses, Gross
Issuance of common stock - equity offering, net of offering expenses
Value of stock issued during the period for equity offering.
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable
Accounts payable and accrued expenses
Operating Segments [Member]
Deferred tax asset
Business Combination, Recognized Asset Acquired, Deferred Tax Asset
Derivative Financial Instruments, Liabilities [Member]
Issuance of common stock - equity offering, net of offering expenses (in shares)
The number of shares issued during the period for equity offering.
Property, plant and equipment
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment