Document And Entity Information
Equity Method Investments [Policy Text Block]
Note To Financial Statement Details Textual
Significant Accounting Policies
Note 2 - Acquisition
Income tax (benefit) expense
Income tax expense (benefit)
Note 3 - Summary of Significant Accounting Policies
Transferred at Point in Time [Member]
Note 4 - Revenue Recognition
Note 5 - Goodwill
Note 6 - Fair Value Measurements
Note 7 - Accounts Receivable
Note 8 - Inventory
Note 9 - Property, Plant and Equipment
Note 10 - Intangible Assets
Note 11 - Equity-Method Investments
us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Gain (Loss), Foreign Currency Transaction, before Tax
Note 12 - Accounts Payable and Accrued Expenses
Note 13 - Contingent Consideration
Note 14 - Income Taxes
Note 16 - Leases
Note 17 - Stockholders' Equity
Note 20 - Business Segments
Note 2 - Acquisition - Schedule of Business Acquisitions (Details)
us-gaap_IncreaseDecreaseInAccountsReceivable
Accounts receivable
Note 2 - Acquisition - Schedule of Business Acquisitions (Details) (Parentheticals)
Retirement Plan Type [Domain]
Note 2 - Acquisition - Assets Acquired and Liabilities Assumed (Details)
us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Accounts payable and accrued expenses
Note 2 - Acquisition - Pro Forma Information (Details)
Note 3 - Summary of Significant Accounting Policies - Property Plant and Equipment Useful Life (Details)
Retirement Plan Type [Axis]
Note 3 - Summary of Significant Accounting Policies - Reconciliation of Numerators and Denominators of EPS Calculation (Details)
Note 4 - Revenue Recognition - Disaggregation of Revenue (Details)
Note 4 - Revenue Recognition - Contract Assets and Liabilities (Details)
Note 4 - Revenue Recognition - Revenues by Major Customers (Details)
Note 5 - Goodwill - Schedule of Goodwill (Details)
Note 6 - Fair Value Measurements - Assets and Liabilities Carried at Fair Value on a Recurring Basis (Details)
Note 6 - Fair Value Measurements - Derivative Liability Measured at Fair Value (Details)
Note 7 - Accounts Receivable - Summary of Accounts Receivable (Details)
Note 8 - Inventory - Summary of Net Inventory (Details)
Note 9 - Property, Plant and Equipment - Cost and Accumulated Depreciation of Property and Equipment (Details)
Note 10 - Intangible Assets - Intangible Assets (Details)
Note 10 - Intangible Assets - Expected Future Amortization Expense (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_ForeignCurrencyTransactionGainLossUnrealized
Unrealized foreign exchange gain on cash and cash equivalents
Note 12 - Accounts Payable and Accrued Expenses - Product Warranty Activity (Details)
Note 13 - Contingent Consideration - Summary of the Key Assumptions Used to Calculate Fair Value of Warrants (Details)
Note 14 - Income Taxes - Income (Loss) Before Income Tax Expense (Details)
Note 14 - Income Taxes - Components of Income Tax Expense (Benefit) (Details)
Note 14 - Income Taxes - Income Tax Rate Reconciliation (Details)
Note 14 - Income Taxes - Schedule of Income Taxes Paid (Details)
Note 14 - Income Taxes - Deferred Tax Assets and Liabilities (Details)
Note 16 - Leases - Operating Lease Assets and Liabilities (Details)
Note 16 - Leases - Lease Cost (Details)
Note 16 - Leases - Minimum Future Lease Obligation (Details)
Note 17 - Stockholders' Equity - Components of Employee Stock-based Compensation (Details)
Note 17 - Stockholders' Equity - Stock-based Compensation Expense by Financial Statement Line Item (Details)
Note 17 - Stockholders' Equity - Stock-based Compensation Expense by Financial Statement Line Item 2 (Details)
Note 17 - Stockholders' Equity - Options Activities (Details)
Note 17 - Stockholders' Equity - Weighted Average Assumptions Used in The Black Scholes Valuation Model (Details)
Note 17 - Stockholders' Equity - Restricted Stock Activity (Details)
Note 20 - Business Segments - Operating Results for Business Segments (Details)
Note 20 - Business Segments - Total Business Segments Assets (Details)
Note 20 - Business Segments - Geographic Information about Property, Plant and Equipment Associated with Particular Regions (Details)
Land [Member]
Notes To Financial Statements
Notes To Financial Statements [Abstract]
Interest income, net
Interest income, net
Leasehold Improvements [Member]
us-gaap_IncreaseDecreaseInInventories
Inventory
Issuance of stock for 401(k) match (in shares)
Issuance of stock for 401(k) match
Segment Reporting [Text Block]
Segment Reporting [Table Text Block]
us-gaap_Liabilities
Total liabilities
Segment Reporting, Reconciliation of Asset by Segment to Consolidated [Table Text Block]
us-gaap_LiabilitiesAndStockholdersEquity
Total liabilities and stockholders' equity
Segment Reporting [Table]
us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Prepaid expenses and other current assets
Selling, general and administrative
Equity Method Investment, Nonconsolidated Investee [Axis]
Equity Method Investment, Nonconsolidated Investee [Domain]
Lessee, Lease, Description [Table]
Equity-method investments
amsc_BusinessCombinationRecognizedAssetAcquiredEquityMethodInvestments
Amount of equity method investments acquired at the acquisition date.
Location, Statement of Income, Balance [Axis]
Changes in operating asset and liability accounts:
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.
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
Balance
Balance
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Net (decrease) increase in cash, cash equivalents and restricted cash
Effect of exchange rate changes on cash, cash equivalents and restricted cash
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Cash, cash equivalents and restricted cash at beginning of year
Cash, cash equivalents and restricted cash at end of year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
Right-of-use assets obtained in exchange for new lease obligations
Trademarks and Trade Names [Member]
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Table Text Block]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Outstanding, restricted stock (in shares)
Outstanding, restricted stock (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Outstanding, restricted stock, weighted average grant date fair value (in dollars per share)
Outstanding, restricted stock, weighted average grant date fair value (in dollars per share)
Granted, restricted stock (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)
Granted, restricted stock, weighted average grant date fair value (in dollars per share)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
Forfeited, restricted stock (in shares)
us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table Text Block]
Vested, restricted stock, weighted average grant date fair value (in dollars per share)
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Vested, restricted stock (in shares)
Thereafter
us-gaap_RepaymentsOfDebt
Repayments of Debt
us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
Property, plant and equipment, net
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Total minimum lease payments
Property, plant and equipment, gross
us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization
Less accumulated depreciation
Weighted-average discount rate
2027
2031
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)
Exercisable, options (in shares)
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]
Exercisable, weighted-average exercise price (in dollars per share)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Outstanding, options (in shares)
Outstanding, options (in shares)
2029
Measurement Frequency [Axis]
Commitments and Contingencies Disclosure [Text Block]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Outstanding, weighted-average exercise price (in dollars per share)
Outstanding, weighted-average exercise price (in dollars per share)
2028
Liability Class [Axis]
Outstanding, aggregate intrinsic value
2030
Fair Value Hierarchy and NAV [Axis]
Common stock, shares issued (in shares)
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Common stock, shares outstanding (in shares)
Balance (in shares)
Balance (in shares)
Award Type [Domain]
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Risk-free interest rate
Common stock, shares authorized (in shares)
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Expected volatility
Dividend yield
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Schedule of Product Warranty Liability [Table Text Block]
Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]
Common stock, $0.01 par value, 75,000,000 shares authorized; 48,035,691 and 39,887,536 shares issued and 47,632,340 and 39,484,185 shares outstanding at March 31, 2026 and 2025, respectively
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.
Schedule of Inventory, Current [Table Text Block]
Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block]
us-gaap_PolicyTextBlockAbstract
Accounting Policies
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
us-gaap_TableTextBlock
Notes Tables
us-gaap_ComprehensiveIncomeNetOfTax
Comprehensive income (loss)
amsc_CashCashEquivalentsAndMarketableSecurities
Cash, Cash Equivalents, and Marketable Securities
Represents the amount of currency on hand as well as demand deposits with banks or financial institutions, and marketable securities.
Subsequent Events [Text Block]
Concentration Risk Type [Axis]
Significant Accounting Policies [Text Block]
Amortization of operating lease right-of-use assets
us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
Less: interest
Lease liability, long term portion
Lease liabilities - LT Operating
Present value of lease liabilities
Lease liability, current portion
Lease liabilities - ST Operating
Performance-based Restricted Stock [Member]
Represents information pertaining to performance-based restricted stock.
Accounts Receivable [Member]
BRAZIL
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]
Concentration Risk Type [Domain]
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.
Business Combination, Contingent Consideration, Type [Domain]
Goodwill [Text Block]
Business Combination, Contingent Consideration, Type [Axis]
Deferred Program Costs, increase for balance acquired
Represents increase/(decrease) in the assets for acquired contracts with customer from revenue recognized as deferred program costs from a business combination.
Unbilled AR, increase for balance acquired
Represents increase/(decrease) in the assets for acquired contracts with customer from revenue recognized on unbilled accounts receivable from a business combination.
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.
Derivative Financial Instruments, Liabilities [Member]
amsc_PaymentsForRegistrationOfCommonStockShares
Cash paid related to registration of common stock shares
Represents payments for the registration of common stock shares.
NWL Pacific Inc. Co., LTD [Member]
Represents information pertaining to NWL Pacific Inc. Co., LTD.
Income Tax Jurisdiction, Domestic State and Local [Member]
Standard Product Warranty, Policy [Policy Text Block]
Statement of Stockholders' Equity [Abstract]
Statement of Comprehensive Income [Abstract]
Statement of Cash Flows [Abstract]
Stockholders' equity:
Equity Components [Axis]
us-gaap_IncreaseDecreaseInOperatingLeaseLiability
Operating leases
Share-Based Payment Arrangement [Policy Text Block]
Equity Component [Domain]
Equity [Text Block]
AOCI Attributable to Parent [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Proceeds from exercise of employee stock options and ESPP
Represents the proceeds from stock options and stock plans exercised.
Provision for excess and obsolete inventory
Inventory Write-down
Subsequent Event Type [Domain]
Subsequent Event [Table]
Subsequent Event Type [Axis]
Cost of revenues
Cost of Revenue
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
Contract Liabilities, increase for balance acquired
Share-Based Payment Arrangement, Cost by Plan [Table Text Block]
Share-Based Payment Arrangement, Option [Member]
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Supplemental schedule of cash flow information:
Current liabilities:
us-gaap_CurrentIncomeTaxExpenseBenefit
Total current
Current Liabilities
Total current liabilities
Federal, Current
us-gaap_CurrentFederalTaxExpenseBenefit
Intangible assets, gross amount
us-gaap_IntangibleAssetsGrossExcludingGoodwill
Foreign, Current
us-gaap_CurrentForeignTaxExpenseBenefit
State, Current
us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Customer Concentration Risk [Member]
us-gaap_TaxCreditCarryforwardAmount
Tax Credit Carryforward, Amount
Lease, Cost [Table Text Block]
Tax Credit Carryforward [Axis]
Tax Credit Carryforward, Name [Domain]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod
Canceled/forfeited, options (in shares)
Customer Relationships [Member]
Revenue Benchmark [Member]
Lessee, Leases [Policy Text Block]
Other Commitments [Table]
Canceled/forfeited, weighted-average exercise price (in dollars per share)
Shares Tied to Derivative Liability [Member]
Represents the shares tied to the derivative liability.
Business Combination, Pro Forma Information [Table]
Backlog [Member]
Represents the information pertaining to backlog.
Debt Disclosure [Text Block]
Measurement Input, EDITDA Continuous Risk Premium
Measurement input using revenue risk premium.
Measurement Input, Revenue Volatility [Member]
Measurement input using revenue volatility.
Use of Estimates, Policy [Policy Text Block]
Measurement Input, Payment Delay [Member]
Measurement input using payment delay.
Issuance of common stock - ESPP
Lessee, Operating Leases [Text Block]
UNITED STATES
Issuance of common stock - acquisition, net of offering expenses
Current assets:
Exercise of stock options
Issuance of common stock - restricted shares, net of forfeited shares
Current Assets
Total current assets
us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture (in shares)
Issuance of common stock - ESPP (in shares)
Debt Instrument, Name [Domain]
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
Issuance of common stock - acquisition, net of offering expenses (in shares)
Exercise of stock options (in shares)
Exercised (in shares)
Issuance of common stock - restricted shares, net of forfeited shares (in shares)
Transportation Equipment [Member]
Schedule of Long-Term Debt Instruments [Table]
Debt Instrument [Axis]
Cash flows from operating activities:
Cash flows from investing activities:
us-gaap_NetCashProvidedByUsedInOperatingActivities
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation
Net cash provided by operating activities
Raw materials
Work-in-process
Cash flows from financing activities:
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash used in investing activities
us-gaap_SharesIssuedPricePerShare
Shares Issued, Price Per Share (in dollars per share)
Intangible Asset, Finite-Lived, and Capitalized Cost, Software to be Sold, Leased, or Marketed, Estimated Amortization Expense [Table Text Block]
Finished goods
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash provided by financing activities
us-gaap_LiabilityForUncertainTaxPositionsCurrent
Liability for Uncertainty in Income Taxes, Current
Commitments and Contingencies, Policy [Policy Text Block]
Accounting Policies [Abstract]
Segments [Axis]
Foreign, Deferred
us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Measurement Input Type [Axis]
Federal, Deferred
us-gaap_DeferredFederalIncomeTaxExpenseBenefit
us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits
Measurement Input, Credit Spread [Member]
us-gaap_DeferredIncomeTaxLiabilities
Total deferred tax liabilities
Deferred income taxes
Total deferred
Net income (loss)
Net income (loss)
Net Income (Loss) Attributable to Parent
Net income (loss)
Measurement Input, Share Price [Member]
Measurement Input Type [Domain]
us-gaap_OtherNoncashIncomeExpense
Other non-cash items
Business Combination, Contingent Consideration, Liability, Measurement Input
State, Deferred
us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Research and development and other tax credit carryforwards
us-gaap_DeferredTaxAssetsGross
Gross deferred tax assets
Fair value (millions)
Business Combination, Contingent Consideration, Liability
Net operating loss carryforwards
Accounting Standards Update and Change in Accounting Principle [Table]
us-gaap_DeferredTaxAssetsLiabilitiesNet
Net deferred tax assets (liabilities)
us-gaap_DeferredTaxAssetsNet
Total deferred tax assets
Other
us-gaap_DeferredTaxAssetsOther
us-gaap_TreasuryStockValueAcquiredCostMethod
Repurchase of treasury stock
Fully vested and expected to vest, options (in shares)
Fully vested and expected to vest, aggregate intrinsic value
Measurement Basis [Axis]
Accruals and reserves
Fully vested and expected to vest, weighted-average exercise price (in dollars per share)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date
us-gaap_OpenTaxYear
Open Tax Year
us-gaap_DeferredTaxAssetsValuationAllowance
Deferred Tax Assets, Valuation Allowance
Valuation allowance
Noncurrent Liabilities
Noncurrent Assets
us-gaap_DeferredTaxLiabilities
Net deferred tax assets (liabilities)
us-gaap_DeferredTaxLiabilitiesOther
Other
Document Type
Document Information [Line Items]
us-gaap_DefinedContributionPlanCostRecognized
Defined Contribution Plan, Cost
Document Annual Report
us-gaap_LesseeOperatingLeaseRenewalTerm
Lessee, Operating Lease, Renewal Term (Year)
Weighted-average remaining lease term (Year)
Document Information [Table]
us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)
us-gaap_WeightedAverageNumberOfSharesCommonStockSubjectToRepurchaseOrCancellation
Weighted-average shares subject to repurchase (in shares)
Entity Interactive Data Current
Business Combination, Share Issued (in shares)
Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares (in shares)
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)
Document Transition Report
us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Diluted (in shares)
Document Financial Statement Error Correction [Flag]
us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Basic (in shares)
us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
Net income
Stock options
us-gaap_StockIssued1
Issuance of common stock
Innomotics LLC [Member]
Represents Innomotics LLC.
EMEA [Member]
Income Tax Jurisdiction [Axis]
Restricted cash
us-gaap_RestrictedCashAndCashEquivalentsNoncurrent
Restricted Cash and Cash Equivalent, Noncurrent
amsc_BusinessAcquisitionProFormaOperatingIncomeLoss
Operating income (loss)
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.
Advanced deposits
ICFR Auditor Attestation Flag
Document Fiscal Period Focus
Customer [Domain]
Document Fiscal Year Focus
Investment, Name [Domain]
Depreciation and amortization
Amendment Flag
Common Stock [Member]
us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease)
Document Period End Date
Property, Plant, and Equipment [Text Block]
Outstanding, restricted stock, intrinsic aggregate value
Long-Lived Asset, Class [Domain]
Granted (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)
Legal Entity [Axis]
Construction in Progress [Member]
Entity File Number
Entity Tax Identification Number
Non-cash investing and financing activities
Entity [Domain]
Entity Central Index Key
Entity Registrant Name
Entity Well-known Seasoned Issuer
Entity Current Reporting Status
Entity Voluntary Filers
Entity Incorporation, State or Country Code
Current Fiscal Year End Date
Entity Public Float
Accounts receivable
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
Prepaid expenses and other current assets
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets
Inventory
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
Cash and cash equivalents
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
Research and development
Entity Filer Category
Entity Shell Company
Entity Emerging Growth Company
Entity Small Business
us-gaap_BusinessCombinationAcquiredReceivablesGrossContractualAmount
Business Combination, Acquired Receivable, Purchased without Credit Deterioration, Gross Contractual Amount
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue
Deferred revenue
Segment operating income (loss)
Operating income (loss)
Operating income (loss):
us-gaap_BusinessCombinationAcquiredReceivablesEstimatedUncollectible
Business Combination, Acquired Receivable, Purchased without Credit Deterioration, Contractual Cash Flow, Estimated Uncollectible
us-gaap_BusinessCombinationAcquiredReceivablesFairValue
Business Combination, Acquired Receivable, Purchased without Credit Deterioration, Fair Value
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable
Accounts payable and accrued expenses
us-gaap_OperatingLossCarryforwards
Operating Loss Carryforwards
Property, plant and equipment
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Intangible assets
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived
us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
Business Combination, Contingent Consideration, Range of Outcomes, Maximum, Amount
us-gaap_Revenues
Revenues
Global intangible low-tax income
us-gaap_BusinessCombinationConsiderationTransferred1
Business Combination, Consideration Transferred
Total consideration
Entity Address, State or Province
Entity Address, City or Town
Inventory, Current [Table]
Entity Address, Address Line One
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
City Area Code
Local Phone Number
Entity Address, Postal Zip Code
Title of 12(b) Security
us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentFinancialAssets
Net tangible assets/(liabilities), adjustments
Security Exchange Name
Trading Symbol
us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred
Total purchase consideration, adjustments
Intangibles, adjustments
us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles
Entity Common Stock, Shares Outstanding
Property, plant and equipment, adjustments
us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPropertyPlantAndEquipment
Inventory, adjustments
us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentInventory
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory
Other comprehensive gain (loss), net of tax:
Weighted-average shares of common stock outstanding (in shares)
us-gaap_BusinessCombinationAcquisitionRelatedCosts
Business Combination, Acquisition-Related Cost, Expense
Restricted cash, adjustments
amsc_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentRestrictedCash
This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to restricted cash acquired in connection with a business combination for which the initial accounting was incomplete.
Cash and cash equivalents, adjustments
amsc_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCashAndCashEquivalents
This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to cash and cash equivalents acquired in connection with a business combination for which the initial accounting was incomplete.
Restricted cash
amsc_BusinessCombinationRecognizedAssetAcquiredRestrictedCash
Amount of restricted cash acquired in business combination and recognized at acquisition date.
Weighted average number of common shares outstanding
Income taxes payable
Prepaid expenses and other current assets, adjustments
amsc_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPrepaidExpensesAndOtherCurrentAssets
This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to prepaid expenses and other current assets acquired in connection with a business combination for which the initial accounting was incomplete.
Accounts receivable, adjustments
amsc_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccountsReceivable
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Receivable
This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to Accounts receivable acquired in connection with a business combination for which the initial accounting was incomplete.
Exercisable, aggregate intrinsic value
us-gaap_PaymentsForProceedsFromOtherInvestingActivities
Change in other assets
Investment, Name [Axis]
Issuance of 2,417,142 shares of Company’s common stock
Business Combination, Consideration Transferred, Equity Interest
amsc_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDebt
Debt, current and long-term, adjustments
This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to debt acquired in connection with a business combination for which the initial accounting was incomplete.
Basis of Accounting, Policy [Policy Text Block]
Contingent consideration
us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
amsc_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredRevenue
Deferred revenue, adjustments
This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to deferred revenue acquired in connection with a business combination for which the initial accounting was incomplete.
Deferred tax asset, adjustments
This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to deferred tax assets acquired in connection with a business combination for which the initial accounting was incomplete.
amsc_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccountsPayableAndAccruedExpenses
Accounts payable and accrued expenses, adjustments
This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to accounts payable and accrued expenses acquired in connection with a business combination for which the initial accounting was incomplete.
Other expense, net
Other expense
Irving Shipbuilding [Member]
Represents information pertaining to Irving Shipbuilding.
amsc_DeferredIncomeTaxAssetsLiabilitiesNet
Net deferred tax assets (liabilities)
Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset (liability) attributable to deductible differences and carryforwards, with jurisdictional netting.
Sale of Product [Member]
Represents at the time of the sale of the product.
Accounts receivable (unbilled)
Other Foreign Tax Authority [Member]
Represents other foreign tax authority.
Schedule of Income Taxes Paid [Table Text Block]
Tabular disclosure of income taxes paid.
Total assets
Total assets
Transaction Costs
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to transaction costs.
Fair value adjustment for Contingent Liability
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to fair value adjustment for contingent liability.
Three Prior Debt Agreements [Member]
Represents information pertaining to three prior debt agreements.
Excess Officer Compensation
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses for excess officer compensation.
Auditor Firm ID
Auditor Name
Geographical [Domain]
Auditor Location
Geographical [Axis]
Accounts receivable (billed)
Diluted (in dollars per share)
Net income (loss) per share - diluted (in dollars per share)
us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
Income from operations
Customer [Axis]
Equity Method Investments and Joint Ventures Disclosure [Text Block]
Intangible Asset [Text Block]
Accounts and Financing Receivables [Table]
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
amsc_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredTaxAssets
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Assets
This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to deferred tax assets acquired in connection with a business combination for which the initial accounting was incomplete.
amsc_BusinessCombinationSharePurchasePriceQuotientAmount
Business Combination, Share Purchase Price Quotient Amount
The amount of share purchase price quotient amount for business combination.
amsc_BusinessCombinationMaximumAdjustmentBeforeIndebtedness
Business Combination, Maximum Adjustment Before Indebtedness
The maximum adjustment amount before indebtedness for a business combination.
Intangible Asset, Finite-Lived [Table Text Block]
Connecticut Tax Authority [Member]
Connecticut Tax Authority
Intangible Asset, Finite-Lived [Table]
Pennsylvania Tax Authority [Member]
Pennsylvania Tax Authority
Other State Tax Authorities [Member]
Other State Tax Authorities
Measurement Input, EBITDA Discount Rate [Member]
The EBITDA discount rate.
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.
Research and development tax credit
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit.
Megatran [Member]
Related to Megatran.
amsc_BusinessCombinationPotentialAdditionalCashPayment
Business Combination, Potential Additional Cash Payment
The amount of potential additional cash payment for business combination.
Business Combination [Text Block]
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.
us-gaap_IncreaseDecreaseInContractWithCustomerLiability
Deferred revenue
Forfeited, restricted stock, weighted average grant date fair value (in dollars per share)
Award Timing MNPI Disclosure [Text Block]
ecd_AwardTmgMnpiCnsdrdFlag
Award Timing MNPI Considered [Flag]
Stock, Class of Stock [Table]
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
Consolidation, Less-than-Wholly-Owned Subsidiary, Parent Ownership Interest, Effect of Change [Table]
Other liabilities
ecd_Rule10b51ArrTrmntdFlag
Rule 10b5-1 Arrangement Terminated [Flag]
ecd_Rule10b51ArrAdoptedFlag
Rule 10b5-1 Arrangement Adopted [Flag]
Commitments and Contingencies (Note 18)
ecd_TrdArrIndTitle
Trading Arrangement, Individual Title
Statistical Measurement [Axis]
ecd_TrdArrIndName
Trading Arrangement, Individual Name
ecd_TrdArrExpirationDate
Trading Arrangement Expiration Date
ecd_TrdArrAdoptionDate
Trading Arrangement Adoption Date
ecd_NonRule10b51ArrTrmntdFlag
Non-Rule 10b5-1 Arrangement Terminated [Flag]
ecd_NonRule10b51ArrAdoptedFlag
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Restricted cash
Trading Arrangements, by Individual [Table]
Retirement Benefits [Text Block]
Material Terms of Trading Arrangement [Text Block]
ecd_InsiderTrdPoliciesProcAdoptedFlag
Insider Trading Policies and Procedures Adopted [Flag]
Financial Instrument [Axis]
Minimum [Member]
Statistical Measurement [Domain]
Insider Trading Policies and Procedures [Line Items]
Maximum [Member]
ecd_TrdArrSecuritiesAggAvailAmt
Trading Arrangement, Securities Aggregate Available Amount
Foreign
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
us-gaap_IncomeLossFromEquityMethodInvestments
Earnings (loss) from equity method investments
us-gaap_BusinessAcquisitionSharePrice
Business Combination, Price Per Share (in dollars per share)
amsc_DeferredTaxLiabilitiesAmortization
Amortization of fixed assets and intangibles
Represents amortization that was included with deferred tax liabilities.
U.S.
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Changes in Valuation Allowance
us-gaap_EffectiveIncomeTaxRateContinuingOperations
Effective income tax rate
us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
U.S. Federal Statutory Income Tax (benefit) at 21%
Statutory income tax rate differential
Granted, weighted-average exercise price (in dollars per share)
us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
Exercised, weighted-average exercise price (in dollars per share)
Income Tax Jurisdiction [Domain]
Performance Shares [Member]
Held Transactions [Member]
Represents held transactions.
Nondeductible expenses
Non Taxable or Non Deductible Items, Other
Financial Instruments [Domain]
Domestic State and local income taxes, net of federal effect
Stock Compensation
Other
Other
us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits
Tax Credits
Worldwide Changes in unrecognized tax benefits
Award Type [Axis]
Adjustments to reconcile net income (loss) to net cash provided by operations:
Plan Name [Axis]
Plan Name [Domain]
Defined Benefit Plan [Table]
Stock-based compensation expense
Total stock-based compensation expense
Share-Based Payment Arrangement, Expense
Consolidation Items [Axis]
Stock-based compensation expense
us-gaap_ShareBasedCompensation
Subsequent Event [Member]
Consolidation Items [Domain]
North America [Member]
South America [Member]
Estimated Useful Life (Year)
us-gaap_FiniteLivedIntangibleAssetUsefulLife
Europe [Member]
us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Month)
Portion at Fair Value Measurement [Member]
Reported Value Measurement [Member]
Fair Value, by Balance Sheet Grouping [Table]
Asia Pacific [Member]
Cash equivalents
Contingent consideration, current portion
Contingent consideration, long term portion
Antidilutive Securities, Name [Domain]
Statement [Table]
Income Tax Authority, Name [Axis]
Income Tax Authority, Name [Domain]
Equity-method investments
Short-term cash instruments
us-gaap_EquityMethodInvestmentOwnershipPercentage
Equity Method Investment, Ownership Percentage
Product and Service [Domain]
Product and Service [Axis]
Property, plant and equipment, useful life (Year)
Secretariat of the Federal Revenue Bureau of Brazil [Member]
Issuance of common stock for contingent consideration
Value of stock issued to settle contingent consideration.
Statement [Line Items]
Issuance of common stock for contingent consideration (in shares)
Number of shares of stock issued during the period to settle contingent consideration.
us-gaap_ProceedsFromIssuanceOrSaleOfEquity
Proceeds from Issuance or Sale of Equity
2028
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
Fair Value of Financial Instruments, Policy [Policy Text Block]
2029
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2027
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
Accounts payable
Accounts payable and accrued expenses
Total
Thereafter
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
2030
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2031
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Accrued compensation
Accrued commissions
Accrued product warranty
Outstanding, weighted-average remaining contractual term (Year)
Accrued other miscellaneous expenses
Fully vested and expected to vest, weighted-average remaining contractual term (Year)
Expected life (years) (Year)
Exercisable, weighted-average remaining contractual term (Year)
Income Tax Jurisdiction, Domestic Federal [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings
Change in fair value
Intangible Asset, Finite-Lived, Class [Axis]
Intangible Asset, Finite-Lived, Class [Domain]
us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
Total other comprehensive (loss) gain, net of tax
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
Total purchase consideration
us-gaap_ProductWarrantyAccrualPayments
Settlements during the period
Fair Value, Inputs, Level 2 [Member]
Provisions for warranties during the period
Fair Value, Inputs, Level 3 [Member]
Acquired warranty obligations
Fair Value, Inputs, Level 1 [Member]
us-gaap_ProductWarrantyAccrual
Balance at beginning of period
Balance at end of period
Income Tax Jurisdiction, Foreign [Member]
Inox Wind Limited [Member]
Represents information pertaining to Inox Wind Limited.
Real Estate [Member]
Foreign Currency Transactions and Translations Policy [Policy Text Block]
Property, plant and equipment, net
us-gaap_PropertyPlantAndEquipmentNet
Property, Plant and Equipment, Net
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.
amsc_ExtendedServiceWarrantyTerm
Extended Service Warranty, Term (Year)
Represents the additional term of extended service-type warranties.
Deferred tax assets
amsc_WarrantyPeriod
Warranty Period (Year)
Represents the typical term of assurance-type warranties on all product sales.
Property, Plant, and Equipment [Policy Text Block]
Mark to market adjustment on contingent consideration
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to mark to market adjustments on contingent consideration.
amsc_ContractWithCustomerPaymentTerm
Contract with Customer, Payment Term (Day)
Represents the payment term, from the date of delivery, under contracts with customers.
Furniture and Fixtures [Member]
Stock-based compensation expense
Grid [Member]
Represents information pertaining to the Grid segment.
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.
Wind [Member]
Represents information pertaining to the Wind segment.
Deferred tax liabilities
Deferred tax liabilities
Accounts Payable and Accrued Liabilities Disclosure [Text Block]
Proceeds from public equity offering, net of offering expenses
Represents the proceeds from equity offerings.
Capitalized research and development costs
Amount before allocation of valuation allowances of deferred tax asset attributable to capitalized research and development.
Fair Value Disclosures [Text Block]
amsc_CapitalizedResearchAndDevelopmentExpenses
Capitalized Research and Development Expenses
Represents capitalized research and development expenses.
The 2022 Stock Incentive Plan [Member]
Represents the 2022 stock incentive plan.
amsc_ContractWithCustomerAssetDeferredProgramCostsNet
Deferred program costs, beginning balance
Deferred program costs, ending balance
Represents the net deferred program costs related to contract with customer.
amsc_ContractWithCustomerAssetUnbilledARNet
Unbilled AR, beginning balance
Unbilled AR, ending balance
Represents the net unbilled AR related to contract with customer.
Deferred Program Costs, increases for costs incurred to fulfill performance obligations
Represents the change in contract costs attributable to deferred program costs related to contract with customer.
Accounts receivable, net
Accounts receivable
Unbilled AR, 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.
Deferred Program Costs, 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
Unbilled AR, 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.
Contract Liabilities, Other changes and foreign currency exchange impact
Represents other changes in the liability from contract with customer.
Deferred Program Costs, Other changes and foreign currency exchange impact
Represents the change in the asset from contract with customer, attributable to other changes in deferred program costs.
Other changes and foreign currency exchange impact
Represents changes in the asset from contract with customer from other changes pertaining to unbilled accounts receivable.
Accumulated other comprehensive income
us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Accumulated Amortization
us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Cash paid for acquisition, net of cash acquired
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income (loss) before income tax (benefit) expense
Income (loss) before taxes
Additional paid-in capital
Prepaid expenses and other current assets
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_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Payments to Acquire Property, Plant, and Equipment
Purchases of property, plant and equipment
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]
us-gaap_GrossProfit
Gross profit
Gross Profit
Goodwill [Table]
Goodwill, adjustments
Measurement period adjustment
Goodwill, Measurement Period Adjustment
Business Combination, Contingent Consideration [Text Block]
The entire disclosure for contingent consideration for business combination.
us-gaap_Depreciation
Depreciation
amsc_OperatingAndFinanceLeaseRightofuseAsset
Total right-of-use assets
Amount of lessee's right to use underlying asset under both operating and finance lease.
us-gaap_TreasuryStockValue
Treasury stock, at cost, 403,351 at March 31, 2026 and 2025
amsc_PolicyTable
Accounts Receivable [Text Block]
The entire disclosure for accounts receivable.
us-gaap_GoodwillImpairmentLoss
Goodwill, Impairment Loss
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]
Operating Segments [Member]
Long-Lived Asset, Excluding Intangible Asset and Goodwill, Impairment and Disposal [Policy Text Block]
Segments [Domain]
us-gaap_UndistributedEarningsOfForeignSubsidiaries
Undistributed Earnings of Foreign Subsidiaries
Accounting Standards Update and Change in Accounting Principle [Text Block]
Accounts Receivable [Policy Text Block]
Internal Revenue Service (IRS) [Member]
Income Statement [Abstract]
us-gaap_NumberOfOperatingSegments
Number of Operating Segments
us-gaap_NumberOfReportableSegments
Number of Reportable Segments
Treasury stock, common shares (in shares)
Amortization of acquisition related intangibles
Treasury Stock, Common [Member]
us-gaap_AmortizationOfIntangibleAssets
Amortization of Intangible Assets
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.
FX impact
us-gaap_GoodwillForeignCurrencyTranslationGainLoss
Income Tax Disclosure [Text Block]
Restricted Stock [Member]
Income Tax, Policy [Policy Text Block]
us-gaap_AssetImpairmentCharges
Asset Impairment Charges
amsc_ShelfRegistrationMaximumAmountToBeSold
Shelf Registration, Maximum Amount to be Sold
Maximum amount to be sold under the shelf registration.
Fair Value Hierarchy and NAV [Domain]
Measurement Frequency [Domain]
us-gaap_RepaymentsOfLongTermDebt
Repayment of debt
Statement of Financial Position [Abstract]
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities
Deferred tax liability
Cash paid for income taxes, net of refunds
Total
Deferred tax asset
Business Combination, Recognized Asset Acquired, Deferred Tax Asset
Fair Value, Recurring [Member]
Other assets
us-gaap_PaymentsForRepurchaseOfCommonStock
Repurchase of treasury stock
Operating expenses:
Concentration percentage
Concentration Risk, Percentage
us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)
Foreign
us-gaap_IncomeTaxPaidForeignAfterRefundReceived
Antidilutive Securities [Axis]
us-gaap_OperatingExpenses
Total operating expenses
Net income (loss) per common share
Intangible Asset, Indefinite-Lived, Class [Domain]
us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted
Diluted (in dollars per share)
us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic
Basic (in dollars per share)
Research Tax Credit Carryforward [Member]
Basic (in dollars per share)
Net income (loss) per share - basic (in dollars per share)
Research and Development Expense, Policy [Policy Text Block]
Cross Border, Other
Intangible Asset, Indefinite-Lived, Class [Axis]
Effective Income Tax Rate Reconciliation [Table]
U.S. State and Local
us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived
Accounts Receivable [Table Text Block]
Tabular disclosure of accounts receivable.
Postemployment Retirement Benefits [Member]
Earnings Per Share, Policy [Policy Text Block]
U.S Federal
us-gaap_IncomeTaxPaidFederalAfterRefundReceived
Intangible assets, net
Intangibles, net
Intangible assets, net
Balance acquired – Comtrafo
us-gaap_GoodwillAcquiredDuringPeriod
Net Book Value
us-gaap_FiniteLivedIntangibleAssetsNet
Total
Gross Amount
us-gaap_FiniteLivedIntangibleAssetsGross
us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue
Restricted Cash and Cash Equivalent, Current
Trade names and trademarks
us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Business Combination, Contingent Consideration [Table]
Goodwill
Goodwill
Goodwill, Balance
Goodwill, Balance
Restructuring
Building [Member]
Operating lease costs - variable
Operating lease costs - fixed
Short-term lease costs
Awards [Member]
Represents awards.
us-gaap_LeaseCost
Total lease costs
Business Combination [Domain]
us-gaap_RevenueRemainingPerformanceObligation
Revenue, Remaining Performance Obligation, Amount
Business Combination [Axis]
Disaggregation of Revenue [Table Text Block]
Disaggregation of Revenue [Table]
Business Combination [Policy Text Block]
Cumulative translation adjustment
us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Business Combination [Table]
Timing of Transfer of Good or Service [Axis]
Timing of Transfer of Good or Service [Domain]
Business Combination, Pro Forma Information [Table Text Block]
Short-term Cash Instruments [Member]
Represents Short-term Cash Instruments.
Austrian Federal Ministry of Finance [Member]
Represents Austrian Federal Ministry of Finance.
National Revenue Administration of Poland [Member]
Represents National Revenue Administration of Poland.
Withholding Taxes
Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to withholding tax.
amsc_CapitalizedResearchAndDevelopmentExpensesRemainingBasis
Capitalized Research and Development Expenses, Remaining Basis
The portion of the capitalized R&E costs that haven't yet been amortized (deducted).
National Agency for Fiscal Administration of Romania [Member]
Represents National Agency for Fiscal Administration of Romania.
Total lease liabilities
Present value of lessee's discounted obligation for lease payments from operating and finance leases.
Increase (decrease) due to customer billings
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations
162(m)
Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to 162m.
Segment other operating expenses
Accumulated deficit
Revenue from Contract with Customer [Text Block]
Equity Method Investment [Table]
Class of Stock [Axis]
Revenue [Policy Text Block]
Fuji Bridex Pte Ltd [Member]
Related to Fuji Bridex Pte Ltd.
Risks and Uncertainties [Policy Text Block]
The accounting policy for risks and uncertainties.
Property, Plant, and Equipment [Table]
Common stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share (in dollars per share)
Issuance of contingent consideration
Core Technology and Know-how [Member]
Represents information pertaining to Core Technology and Know-how.
amsc_DefinedContributionPlanPercentageOfFirstEligibleEmployeeContributionMatchedByEmployer
Defined Contribution Plan, Percentage of First Eligible Employee Contribution Matched by Employer
Defined Contribution Plan Percentage Of First Eligible Employee Contribution Matched By Employer
amsc_DefinedContributionPlanCompanyContributionPercentageMatchCommonStock
Defined Contribution Plan, Company Contribution, Percentage Match Common Stock
Defined Contribution Plan Company Contribution Percentage Match Common Stock
Other Tax Credit Carryforwards [Member]
Represents the information pertaining to other tax credit carryforwards.
us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax
Foreign currency translation gain (loss)
amsc_OperatingLossCarryforwardsIndefinite
Operating Loss Carryforwards Indefinite
Amount of operating loss carryforward indefinite.
Long-Lived Asset, Class [Axis]
Fixed assets and intangible assets
Amount, before allocation of valuation allowance, of deferred tax asset attributable to fixed assets and intangible assets.
NOL and capital loss expiration
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to true up of net operating loss.
amsc_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodGrantDateFairValue
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Grant Date Fair Value
The grant-date fair value of equity instruments other than options granted during the reporting period as calculated by applying the disclosed option pricing methodology.
Cash and Cash Equivalents, Policy [Policy Text Block]
The 2007 Director Plan [Member]
Represents the information pertaining to the 2007 Director Plan
amsc_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsGrantsInPeriodGrantDateFairValue
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Grant Date Fair Value
The grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.
The 2007 Plan [Member]
Represents the information pertaining to the 2007 plan.
Cash and cash equivalents
Awards by Employee Stock Purchase Plan [Member]
Represents the awards granted by the employee stock purchase plan.
Employee Stock Purchase Plan [Member]
Represents the information pertaining to employee stock purchase plan.
Property Plant and Equipment Useful Life [Table Text Block]
Tabular disclosure of useful life of property plant and equipment.
amsc_ExtendedWarrantyTriggerPeriod
Extended Warranty Trigger Period (Year)
The period in which customers may extend their warranty for an additional term.
Deferred revenue, long term portion
us-gaap_ContractWithCustomerLiability
Contract liabilities, beginning balance
Contract liabilities, ending balance
Cash payments
Payments to Acquire Businesses, Gross
Deferred revenue, current portion
us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsRevenuesAndGainsRecognized
Business Combination, Separately Recognized Transactions, Revenues and Gains Recognized
Comtrafo Industria de Transformadores Eletricos S.A. (Comtrafo) [Member]
Represents information pertaining to Comtrafo Industria de Transformadores Eletricos S.A.
Equity Method Investments [Table Text Block]
Immediately Vested Common Stock [Member]
Represents common stock which is vested immediately upon issuance.
Fair Value by Liability Class [Domain]
Interim Period, Costs Not Allocable [Table]
Inventory Disclosure [Text Block]
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.
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.
Business Combination [Table Text Block]
Inventory, net
Inventory
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.
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
us-gaap_StockholdersEquity
Total stockholders' equity
Balance
Balance
Goodwill [Table Text Block]
us-gaap_PaymentForContingentConsiderationLiabilityInvestingActivities
Payment for Contingent Consideration Liability, Investing Activities
Cash paid to settle NWL contingent consideration liability
us-gaap_InventoryValuationReserves
Inventory Valuation Reserves
Issuance of common stock - Equity Offering
Value of stock issued during the period for equity offering.
Right-of-use assets
Right-of-use assets - Operating
Property, Plant, and Equipment [Table Text Block]
Issuance of common stock - Equity Offering (in shares)
Stock Issued During Period, Shares, Equity Offering (in shares)
The number of shares issued during the period for equity offering.
Revenues
Revenue from Contract with Customer, Including Assessed Tax
Inventory, Policy [Policy Text Block]
us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount