Document And Entity Information
Trade names and trademarks
Net identifiable intangible assets/(liabilities)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles
Note To Financial Statement Details Textual
Significant Accounting Policies
Note 2 - Summary of Significant Accounting Policies
Note 3 - NEPSI Acquisition
Risk-free interest rate
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
Income Tax Disclosure [Text Block]
Note 10 - Intangible Assets
Note 11 - Accounts Payable and Accrued Expenses
Note 12 - Warrants and Derivative Liabilities
Inventory
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory
Note 13 - Income Taxes
Expected volatility
Note 14 - Leases
us-gaap_LiabilitiesCurrent
Total current liabilities
Note 15 - Stockholders' Equity
Note 18 - Business Segments
Note 2 - Summary of Significant Accounting Policies - Property Plant and Equipment Useful Life (Details)
Expected life (years) (Year)
Note 2 - Summary of Significant Accounting Policies - Net Income (Loss) Per Share (Details)
Note 3 - NEPSI Acquisition - Purchase Price (Details)
Issuance of 873,657 shares of Company’s common stock
us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
Note 3 - NEPSI Acquisition - Purchase Price (Details) (Parentheticals)
us-gaap_BusinessCombinationConsiderationTransferred1
Business Combination, Consideration Transferred, Total
Total consideration
Note 3 - NEPSI Acquisition - Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value
Note 3 - NEPSI Acquisition - Unaudited Pro Forma Operating Results (Details)
Note 4 - Revenue Recognition - Disaggregation of Revenue (Details)
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Note 4 - Revenue Recognition - Contract Assets and Liabilities (Details)
Outstanding, restricted stock, intrinsic aggregate value
Note 4 - Revenue Recognition - Revenues By Major Customers (Details)
Contingent consideration
us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
Business Combination, Consideration Transferred, Liabilities Incurred
Note 5 - Goodwill - 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)
us-gaap_LiabilityForUncertainTaxPositionsCurrent
Liability for Uncertainty in Income Taxes, Current
Share-based Payment Arrangement, Option, Activity [Table Text Block]
Note 6 - Fair Value Measurements - Liabilities Measured at Fair Value on a Recurring Basis (Details)
Note 7 - Accounts Receivable - Summary of Accounts Receivable (Details)
Note 8 - Inventory - Summary of Net Inventory (Details)
Granted, restricted stock, weighted average grant date fair value (in dollars per share)
Note 9 - Property, Plant and Equipment - Cost and Accumulated Depreciation of Property and Equipment (Details)
Vested, restricted stock, weighted average grant date fair value (in dollars per share)
Sale of marketable securities
Contingent consideration
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
Forfeited, restricted stock, weighted average grant date fair value (in dollars per share)
Note 10 - Intangible Assets - Intangible Assets (Details)
Note 10 - Intangible Assets - Expected Future Amortization Expense (Details)
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)
Note 11 - Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
Forfeited, restricted stock (in shares)
us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic
Basic (in dollars per share)
Note 11 - Accounts Payable and Accrued Expenses - Product Warranty Activity (Details)
Note 12 - Warrants and Derivative Liabilities - Summary of the Key Assumptions Used to Calculate Fair Value of Warrants (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Outstanding, restricted stock (in shares)
Outstanding, restricted stock (in shares)
Foreign currency translation losses
Cumulative translation adjustment
Note 13 - Income Taxes - Income (Loss) Before Income Tax Expense (Details)
Note 13 - Income Taxes - Components of Income Tax Expense (Benefit) (Details)
Note 13 - Income Taxes - Income Tax Rate Reconciliation (Details)
Granted, restricted stock (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)
Note 13 - Income Taxes - Deferred Tax Assets and Liabilities (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Vested, restricted stock (in shares)
us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted
Diluted (in dollars per share)
Note 14 - Leases - Operating Lease Assets and Liabilities (Details)
Share-based Payment Arrangement, Cost by Plan [Table Text Block]
Fully vested and expected to vest, weighted-average remaining contractual term (Year)
Note 14 - Leases - Lease Cost (Details)
Note 14 - Leases - Minimum Future Lease Obligation (Details)
Note 15 - Stockholders' Equity - Components of Employee Stock-based Compensation (Details)
Note 15 - Stockholders' Equity - Summarizes Employee Stock-based Compensation Expense by Financial Statement Line Item (Details)
Note 15 - Stockholders' Equity - Options Activities (Details)
Fully vested and expected to vest, options (in shares)
Note 15 - Stockholders' Equity - Stock Options Granted (Details)
Fully vested and expected to vest, weighted-average exercise price (in dollars per share)
Note 15 - Stockholders' Equity - Restricted Stock Activity (Details)
Fully vested and expected to vest, aggregate intrinsic value
Note 18 - Business Segments - Operating Results for Business Segments (Details)
Exercisable, weighted-average exercise price (in dollars per share)
Note 18 - Business Segments - Total Business Segments Assets (Details)
us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax
Operating loss
Exercisable, weighted-average remaining contractual term (Year)
us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
Net loss
Note 18 - Business Segments - Geographic Information about Property, Plant and Equipment Associated with Particular Regions (Details)
us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual
Outstanding, aggregate intrinsic value
Notes To Financial Statements
us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual
Notes To Financial Statements [Abstract]
Business Acquisition, Pro Forma Information [Table Text Block]
Grant [Member]
Exercisable, options (in shares)
us-gaap_BusinessAcquisitionsProFormaRevenue
Revenues
Outstanding, weighted-average remaining contractual term (Year)
us-gaap_PaymentsToAcquireMarketableSecurities
Purchase of marketable securities
Business Combination, Contingent Consideration, Liability, Measurement Input
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Outstanding, weighted-average exercise price (in dollars per share)
Outstanding, weighted-average exercise price (in dollars per share)
Accounts payable and accrued expenses
Total
Deferred revenue, current portion
Canceled/forfeited, weighted-average exercise price (in dollars per share)
Goodwill and Intangible Assets Disclosure [Text Block]
Schedule of Goodwill [Table Text Block]
Granted, weighted-average exercise price (in dollars per share)
Exercised, weighted-average exercise price (in dollars per share)
Accrued compensation
Income taxes payable
Lessee, Operating Leases [Text Block]
Accounts payable
Secured Debt [Member]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Outstanding, options (in shares)
Outstanding, options (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod
Canceled/forfeited, options (in shares)
Credit Facility [Axis]
Proceeds from the sale of property, plant and equipment
Credit Facility [Domain]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
Accrued other miscellaneous expenses
us-gaap_PolicyTextBlockAbstract
Accounting Policies
Trademarks and Trade Names [Member]
Trade Names [Member]
Accrued product warranty
us-gaap_DebtSecuritiesAvailableForSaleUnrealizedGainLoss
Debt Securities, Available-for-sale, Unrealized Gain (Loss), Total
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)
Issuance of common stock
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date
Common stock warrants (in shares)
us-gaap_PaymentsToAcquireIntangibleAssets
Purchase of intangible assets
Indefinite-lived Intangible Assets [Axis]
Indefinite-lived Intangible Assets, Major Class Name [Domain]
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Purchase of property, plant and equipment
Non-cash investing and financing activities
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)
us-gaap_WeightedAverageNumberOfSharesCommonStockSubjectToRepurchaseOrCancellation
Weighted-average shares subject to repurchase (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (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)
Current liabilities:
Total assets
Total assets
Supplemental schedule of cash flow information:
Plan Name [Axis]
Plan Name [Domain]
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total
us-gaap_PaymentsToAcquireRealEstate
Payments to Acquire Real Estate, Total
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)
Customer Relationships [Member]
us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted
Net loss - diluted
Deferred tax assets
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
Equity Interest Type [Axis]
EPC Services Company [Member]
Represents EPC Services Company.
Equity Interest Issued or Issuable, Type [Domain]
Award Type [Domain]
us-gaap_EscrowDeposit
Escrow Deposit
Restricted cash
Award Type [Axis]
Net loss
Net loss
Net loss
us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Accumulated Amortization
Net Book Value
us-gaap_FiniteLivedIntangibleAssetsNet
Total
Intangible assets, net
Intangibles, net
Gross Amount
us-gaap_FiniteLivedIntangibleAssetsGross
Restricted Stock [Member]
Performance Shares [Member]
Share-based Payment Arrangement, Option [Member]
NEPSI Acquisition
Gross Amount
us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Business Combination Disclosure [Text Block]
Commitments and Contingencies Disclosure [Text Block]
us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Less accumulated depreciation
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
Property, plant and equipment, net
Property, plant and equipment, net
Property, Plant and Equipment, Net
Goodwill
Goodwill
March 31, 2020
March 31, 2021
Property, plant and equipment, gross
Long-term Debt, Type [Axis]
Long-term Debt, Type [Domain]
Northeast Power Systems, Inc (NEPSI) [Member]
Represents Northeast Power Systems, Inc (NEPSI).
Marketable securities
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.
Cash flows from investing activities:
amsc_SupplyCommitmentLettersOfCreditReceived
Supply Commitment, Letters of Credit Received
The amount of letters of credit received during the period for supply commitment.
Net loss per common share
us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Accounts payable and accrued expenses
Letter of Credit [Member]
Income tax (benefit) expense
Income tax (benefit) expense
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.
us-gaap_OperatingExpenses
Total operating expenses
us-gaap_DefinedContributionPlanCostRecognized
Defined Contribution Plan, Cost
Restricted cash
us-gaap_RestrictedCashAndCashEquivalentsNoncurrent
Restricted Cash and Cash Equivalents, Noncurrent, Total
us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue
Restricted Cash and Cash Equivalents, Current, Total
Change in fair value of warrants
Gain (Loss) in Change of Fair Value of Derivative Instruments and Warrants, Net of Tax
Represents the gain (loss) in change of fair value of derivative instruments and warrants recorded during the period, net of tax.
Cash and cash equivalents
Stock-based compensation expense
us-gaap_AllocatedShareBasedCompensationExpense
Share-based Payment Arrangement, Expense
Mark to market adjustment
Mark to market adjustment
Amendment Flag
us-gaap_ComprehensiveIncomeNetOfTax
Comprehensive loss
Comprehensive Income
Use of Estimates, Policy [Policy Text Block]
us-gaap_IncreaseDecreaseInContractWithCustomerLiability
Deferred revenue
Common stock, shares outstanding (in shares)
Balance (in shares)
Balance (in shares)
Doosan Heavy Industries Construction Co [Member]
Represents Doosan Heavy Industries & Construction Co., Ltd.
Current Fiscal Year End Date
Operating lease costs - variable
us-gaap_LeaseCost
Total lease costs
us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Prepaid expenses and other current 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
Weighted-average remaining lease term (Year)
Entity Emerging Growth Company
Document Type
amsc_SupplyCommitmentExtensionPeriod
Supply Commitment, Extension Period (Year)
Represents the extension period under a supply commitment.
us-gaap_AssetImpairmentCharges
Asset Impairment Charges, Total
Entity Small Business
Inox Wind Limited [Member]
Represents information pertaining to Inox Wind Limited.
Entity Shell Company
amsc_SupplyAgreementAggregateValue
Supply Agreement, Aggregate Value
Represents the aggregate value of a supply agreement.
Document Information [Line Items]
Public Offering [Member]
Represents the public offering.
Document Information [Table]
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
Balance
Balance
Entity Public Float
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements
Exercise of in-the-money warrants
Entity Filer Category
Entity Current Reporting Status
NEPSI [Member]
Represents NEPSI.
Entity Voluntary Filers
Restricted Common Stock [Member]
Represents the restricted common stock.
us-gaap_BusinessCombinationAcquisitionRelatedCosts
Business Combination, Acquisition Related Costs
Entity Well-known Seasoned Issuer
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
Concentration risk percentage
Concentration Risk, Percentage
us-gaap_IncreaseDecreaseInAccountsReceivable
Accounts receivable
Stock-based compensation expense
Statement of Comprehensive Income [Abstract]
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.
Depreciation and amortization
Entity Registrant Name
Liability Class [Axis]
Fair Value by Liability Class [Domain]
Entity [Domain]
Customer Concentration Risk [Member]
Legal Entity [Axis]
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, Total
us-gaap_TreasuryStockValueAcquiredCostMethod
Repurchase of treasury stock
Services and Technology Development [Member]
Represents information pertaining to services and technology development.
Geographic Concentration Risk [Member]
Amortization of acquisition related intangibles
Equipment and Systems [Member]
Represents information pertaining to equipment and systems.
Concentration Risk Type [Axis]
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 [Domain]
Wind [Member]
Represents information pertaining to the Wind segment.
us-gaap_TreasuryStockValue
Treasury stock, at cost, 395,136 and 297,878 shares at March 31, 2021 and 2020, respectively
Entity Common Stock, Shares Outstanding (in shares)
Revenue Benchmark [Member]
Accounts Receivable [Member]
Investments [Domain]
us-gaap_IncreaseDecreaseInInventories
Inventory
Trading Symbol
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
Investment Type [Axis]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Issuance of common stock - NEPSI acquisition (in shares)
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.
Issuance of common stock - ESPP (in shares)
Issuance of stock for 401(k) match
Issuance of stock for 401(k) match (in shares)
Issuance of common stock - NEPSI acquisition
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.
Exercise of stock options (in shares)
Exercised (in shares)
us-gaap_TableTextBlock
Notes Tables
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.
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.
Issuance of common stock - ESPP
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 (in shares)
Deferred Program Costs, increase (decrease) due to recognition of revenue based on transfer of control of performance obligations
Represents the change in the asset from contract with customer due to revenue recognized from deferred program costs.
Exercise of stock options
Issuance of common stock - restricted shares
Plus: change in fair value due to exercise of warrants
Represents the change in fair value of warrants due to exercise.
Selling, general and administrative
Granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)
Issuance of common stock - equity offering (in shares)
Stock Issued During Period, Shares, New Issues (in shares)
Raw materials
us-gaap_LiabilitiesAndStockholdersEquity
Total liabilities and stockholders' equity
Finished goods
Work-in-process
Reported Value Measurement [Member]
Issuance of common stock - equity offering
Deferred revenue
amsc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredRevenue
Amount of deferred revenue recognized as of the acquisition date.
amsc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetTangibleAssetsLiabilitis
Net tangible assets/(liabilities)
Amount recognized as of the acquisition date for the net tangible assets (liabilities).
Accumulated deficit
Retained Earnings (Accumulated Deficit), Ending Balance
Research and development
Accumulated other comprehensive loss
Backlog [Member]
Represents the information pertaining to backlog.
amsc_IntangibleAssetsMeasurementInput
Intangible Assets, Measurement Input
Value of input used to measure intangible assets.
Royalty Rate [Member]
Represents the royalty rate.
Measurement Input, Discount Rate [Member]
Net working capital (excluding inventory and deferred revenue)
amsc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetWorkingCapital
Amount of net working capital recognized as of the acquisition date.
us-gaap_CommonUnitIssued
Common Unit, Issued (in shares)
Measurement Input, Share Price [Member]
Measurement Input, Revenue Risk Premium [Member]
Measurement input using revenue risk premium.
Changes in operating asset and liability accounts:
Measurement Input, Revenue Volatility [Member]
Measurement input using revenue volatility.
Measurement Input, Payment Delay [Member]
Measurement input using payment delay.
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
Derivative Instruments and Hedging Activities Disclosure [Text Block]
us-gaap_OtherNoncashIncomeExpense
Other non-cash items
Inventory Disclosure [Text Block]
Subsequent Event [Member]
Lease liability, long term portion
Lease liabilities - LT
Measurement Input, Expected Term [Member]
Schedule of Inventory, Current [Table Text Block]
Total operating lease liabilities
Subsequent Event Type [Axis]
Lease liabilities - ST
Subsequent Event Type [Domain]
us-gaap_ForeignCurrencyTransactionGainLossUnrealized
Unrealized foreign exchange loss/(gain) on cash and cash equivalents
Retirement Benefits [Text Block]
Intangible assets, gross amount
us-gaap_IntangibleAssetsGrossExcludingGoodwill
Subsequent Events [Text Block]
Right-of-use assets
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Total minimum lease payments
us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
Less: interest
Deferred income taxes
Total deferred
Naval Surface Warfare Center [Member]
Information pertaining to the Naval Surface Warfare Center.
Measurement Input Type [Axis]
Thereafter
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
2024
RWE Renewables [Member]
Information pertaining to RWE Renewables.
Measurement Input Type [Domain]
2025
2026
Thereafter
2023
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
Fair Value of Financial Instruments, Policy [Policy Text Block]
Romanian National Agency for Fiscal Administration [Member]
Information related to the Romanian National Agency for Fiscal Administration (ANAF).
2024
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
us-gaap_DebtSecuritiesAvailableForSaleTerm
Debt Securities, Available-for-sale, Term (Year)
Neeltran and International [Member]
Information related to Neeltran and International.
2025
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2022
Neeltran [Member]
Information related to Neeltran.
2026
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
2023
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
amsc_ContractWithCustomerAssetUnbilledArIncreaseDecreasesForBalancesAcquired
Increases for balances acquired
Amount of increase (decrease) in unbilled accounts receivable for balances acquired.
2022
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
Neeltran Third Party Lenders [Member]
Information related to Neeltran third-party lenders.
Change in fair value of warrants
us-gaap_FairValueAdjustmentOfWarrants
Less: decrease in fair value of warrants, net of income tax
AMSC Husky LLC [Member]
Information related to AMSC Husky LLC.
Foreign Currency Transactions and Translations Policy [Policy Text Block]
Owners of Neeltran Headquarters [Member]
Information related to the owners of the Neeltran headquarters building.
TD Bank [Member]
Information related to TD Bank.
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
us-gaap_ShareBasedCompensation
Stock-based compensation expense
Issuance of common stock to settle liabilities
Other assets
Lessee, Leases [Policy Text Block]
Neeltran Stockholders [Member]
Information related to Neeltran stockholders.
Business Combinations Policy [Policy Text Block]
Estimated Useful Life (Year)
us-gaap_FiniteLivedIntangibleAssetUsefulLife
Finite-Lived Intangible Asset, Useful Life (Year)
Earnings Per Share, Policy [Policy Text Block]
Non-cash interest income
us-gaap_Revenues
Revenues, Total
amsc_AdditionalSharesToBeIssued
Additional Shares to be Issued (in shares)
Represents the number of additional shares to be issued.
Operating expenses:
Infinia Technology Corporation (ITC) [Member]
Represents information pertaining to Infinia Technology Corporation (ITC), or to the acquisition of the company by that name.
Income Tax, Policy [Policy Text Block]
Schedule of Finite-Lived Intangible Assets [Table Text Block]
us-gaap_LesseeOperatingLeaseRenewalTerm
Lessee, Operating Lease, Renewal Term (Year)
Research and Development Expense, Policy [Policy Text Block]
us-gaap_Depreciation
Depreciation, Total
Accounts Receivable [Text Block]
The entire disclosure for accounts receivable.
Marketable securities, long term portion
Intangible Assets Disclosure [Text Block]
us-gaap_SharesIssuedPricePerShare
Shares Issued, Price Per Share (in dollars per share)
us-gaap_AssetsCurrent
Total current assets
Cash equivalents
Share-based Payment Arrangement [Policy Text Block]
Stockholders' Equity Note Disclosure [Text Block]
Change in fair value of contingent consideration
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability
Treasury stock, shares (in shares)
Interest income, net
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
Common stock, $0.01 par value, 75,000,000 shares authorized; 27,988,536 and 22,902,288 shares issued and 27,593,400 and 22,604,410 shares outstanding at March 31, 2021 and 2020, respectively
amsc_SupplyCommitmentDefaultLettersOfCreditToBeReceived
Supply Commitment, Default, Letters of Credit to be Received
The amount of letters of credit to be received for goods and services to be continued under the supply commitment.
Adjustments to reconcile net loss to net cash used in 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)
Certificates of Deposit [Member]
Common stock, par value (in dollars per share)
us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount
Asia Pacific [Member]
Standard Product Warranty, Policy [Policy Text Block]
us-gaap_DeferredTaxAssetsValuationAllowance
Deferred Tax Assets, Valuation Allowance, Total
Valuation allowance
Statistical Measurement [Domain]
Issuance of common stock-warrant exercise (in shares)
Represents number of shares of common stock issued during period for warrant exercise.
Maximum [Member]
Issuance of common stock-warrant exercise
Represents the amount of stock issued during period for warrant exercise.
Commitments and Contingencies, Policy [Policy Text Block]
Minimum [Member]
Product and Service [Axis]
Product and Service [Domain]
Unbilled AR,Decrease due to cost recognition on completed performance obligations
Represents decrease in the asset from the contract with customer from revenue recognized on unbilled accounts receivable due to cost recognition on completed performance obligations.
us-gaap_DeferredTaxAssetsNet
Total deferred tax assets
Statistical Measurement [Axis]
Hercules [Member]
Represents information related to Hercules.
us-gaap_NumberOfReportingUnits
Number of Reporting Units
us-gaap_DeferredTaxAssetsLiabilitiesNet
Net deferred tax assets
North America [Member]
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]
Other
us-gaap_DeferredTaxAssetsOther
us-gaap_PaymentsToSuppliers
Payments to Suppliers
Geographical [Axis]
Property, Plant and Equipment Disclosure [Text Block]
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]
Geographical [Domain]
Property, Plant and Equipment [Table Text Block]
us-gaap_DeferredTaxAssetsGross
Gross deferred tax assets
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]
us-gaap_DeferredIncomeTaxLiabilities
Total deferred tax liabilities
Europe [Member]
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]
Inventory
Inventory
Portion at Fair Value Measurement [Member] [Default]
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]
amsc_GainLossOnDecreaseFairValueUponExerciseOfWarrant
Gain (Loss) on Decrease Fair Value Upon Exercise of Warrant
Represents gain loss on decrease fair value upon exercise of warrant.
Property, plant and equipment, estimated useful life
Revenues
us-gaap_InventoryValuationReserves
Inventory Valuation Reserves, Ending Balance
Measurement Basis [Axis]
us-gaap_InventoryAdjustments
Inventory Adjustments, Total
Fair Value, Inputs, Level 3 [Member]
Research and development and other tax credit carryforwards
us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Foreign Currency Transaction Gain (Loss), before Tax, Total
Fair Value Hierarchy and NAV [Domain]
Customer [Axis]
Customer [Domain]
Fair Value, Inputs, Level 1 [Member]
Fair Value, Inputs, Level 2 [Member]
Reconciliation of Assets from Segment to Consolidated [Table Text Block]
Fair Value Hierarchy and NAV [Axis]
us-gaap_ProductWarrantyAccrualPayments
Settlements during the period
Warrant Liability [Member]
Represents information related to warrant liability.
Acquired Warranty Obligation
Hercules Technology Growth Capital [Member]
Represents information pertaining to Hercules Technology Growth Capital.
Accruals and reserves
November 2014 Warrant [Member]
Represents information pertaining to the November 2014 Warrant.
Hercules Warrants [Member]
Represents information pertaining to warrants to purchase shares of common stock.
Change in accruals for warranties during the period
amsc_CommonSharesPerUnit
Common Shares Per Unit (in shares)
Represents the number of common shares in each unit.
Property, plant and equipment, useful life (Year)
amsc_ClassOfWarrantOrRightNumberOfWarrantsToPurchaseOneShareOfStock
Class of Warrant or Right, Number of Warrants to Purchase One Share of Stock (in shares)
Represents the number of warrants (to purchase one share of stock) included in each unit.
Construction in Progress [Member]
Cash flows from operating activities:
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Revenue [Policy Text Block]
Statement [Line Items]
us-gaap_NumberOfOperatingSegments
Number of Operating Segments
Furniture and Fixtures [Member]
Accounts receivable
Accounts receivable
us-gaap_NumberOfReportableSegments
Number of Reportable Segments
Building [Member]
us-gaap_MarketableSecuritiesCurrent
Marketable securities
AOCI Attributable to Parent [Member]
Additional paid-in capital
Schedule of Product Warranty Liability [Table Text Block]
Stockholders' equity:
Land [Member]
Leasehold Improvements [Member]
Property, Plant and Equipment, Policy [Policy Text Block]
Other (expense) income, net
Long-Lived Tangible Asset [Axis]
Segment Reporting Disclosure [Text Block]
Long-Lived Tangible Asset [Domain]
Net operating loss carryforwards
Current assets:
Fair Value Disclosures [Text Block]
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Cash, cash equivalents and restricted cash at beginning of year
Cash, cash equivalents and restricted cash at end of year
Inventory, Policy [Policy Text Block]
Effect of exchange rate changes on cash, cash equivalents and restricted cash
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Net increase (decrease) in cash, cash equivalents and restricted cash
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash provided by financing activities
us-gaap_Liabilities
Total liabilities
Commitments and contingencies (Note 16)
Sale of Stock [Axis]
Sale of Stock [Domain]
Increase (decrease) due to customer billings
us-gaap_OperatingIncomeLoss
Operating loss
Operating profit (loss)
us-gaap_NetCashProvidedByUsedInOperatingActivities
Net Cash Provided by (Used in) Operating Activities, Total
Net cash used in operating activities
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations
us-gaap_DeferredTaxLiabilitiesOther
Other
Increases for balances acquired
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash provided by (used in) investing activities
Prepaid expenses and other current assets
Cost of revenues
us-gaap_GrossProfit
Gross profit
Counterparty Name [Axis]
Counterparty Name [Domain]
Consolidation Items [Domain]
Deferred tax liabilities
Provision for excess and obsolete inventory
us-gaap_ContractWithCustomerLiability
Contract Liabilities, beginning balance
Contract Liabilities, ending balance
Consolidation Items [Axis]
Marketable Securities, Policy [Policy Text Block]
us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation
Employee taxes paid related to net settlement of equity awards
us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries
amsc_ClassOfWarrantOrRightWarrantsExercised
Class of Warrant or Right, Warrants Exercised (in shares)
The number of warrants or rights exercised during the period.
us-gaap_ProductWarrantyAccrual
Balance at beginning of period
Balance at end of period
Department of Homeland Security [Member]
Related to the Department of Homeland Security.
amsc_ClassOfWarrantOrRightWarrantsExpired
Class of Warrant or Right, Warrants Expired (in shares)
The number of warrants or rights expired during the period.
Accounts receivable (billed)
us-gaap_UndistributedEarningsOfForeignSubsidiaries
Undistributed Earnings of Foreign Subsidiaries
Accounts Receivable [Table Text Block]
Tabular disclosure of accounts receivable.
Proceeds from exercise of warrants
Retained Earnings [Member]
Proceeds from public equity offering, net
Proceeds from Issuance of Common Stock
Treasury Stock [Member]
Proceeds from exercise of employee stock options and ESPP
Foreign
us-gaap_CurrentForeignTaxExpenseBenefit
Foreign
us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Additional Paid-in Capital [Member]
Common Stock [Member]
Federal
us-gaap_CurrentFederalTaxExpenseBenefit
Federal
us-gaap_DeferredFederalIncomeTaxExpenseBenefit
Equity Components [Axis]
Equity Component [Domain]
us-gaap_CurrentIncomeTaxExpenseBenefit
Total current
us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Month)
us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)
us-gaap_RevenueRemainingPerformanceObligation
Revenue, Remaining Performance Obligation, Amount
Class of Warrant or Right [Axis]
Class of Warrant or Right [Domain]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
Foreign
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
us-gaap_ClassOfWarrantOrRightOutstanding
Class of Warrant or Right, Outstanding (in shares)
Total
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Loss before income tax expense
State Administration of Taxation, China [Member]
us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)
U.S.
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
amsc_BusinessAcquisitionWeightedAverageNumberOfSharesOutstandingDiluted
Shares - diluted (in shares)
The pro forma weighted average number of shares outstanding diluted for the period as if the business combination or combinations had been completed at the beginning of a period.
Other comprehensive loss, net of tax:
amsc_BusinessAcquisitionWeightedAverageNumberOfSharesOutstandingBasic
Shares - basic (in shares)
The pro forma weighted average number of shares outstanding basic for the period as if the business combination or combinations had been completed at the beginning of a period.
State and Local Jurisdiction [Member]
Income Tax Authority, Name [Axis]
Income Tax Authority, Name [Domain]
Income Tax Authority [Axis]
Income Tax Authority [Domain]
Disaggregation of Revenue [Table Text Block]
Domestic Tax Authority [Member]
Foreign Tax Authority [Member]
Revenue from Contract with Customer [Text Block]
Machinery and Equipment [Member]
Cash and Cash Equivalents, Policy [Policy Text Block]
Receivable [Policy Text Block]
us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits, Ending Balance
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]
Basis of Accounting, Policy [Policy Text Block]
Selling, General and Administrative Expenses [Member]
Entity Interactive Data Current
Title of 12(b) Security
Cost of Sales [Member]
Research and Development Expense [Member]
Income Statement Location [Axis]
Income Statement Location [Domain]
Advanced deposits
Fuji Bridex Pte Ltd [Member]
Related to Fuji Bridex Pte Ltd.
Risks and Uncertainties [Policy Text Block]
The accounting policy for risks and uncertainties.
Segments [Axis]
Segments [Domain]
us-gaap_TaxCreditCarryforwardAmount
Tax Credit Carryforward, Amount
Research Tax Credit Carryforward [Member]
us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)
Diluted (in shares)
Shares used in per-share calculation - diluted (in shares)
Tax Credit Carryforward [Axis]
Non-US [Member]
Tax Credit Carryforward, Name [Domain]
us-gaap_OperatingLossCarryforwards
Operating Loss Carryforwards, Total
Accounts receivable (unbilled)
amsc_StockIssuedDuringPeriodSharesWarrantExercised
Stock Issued During Period, Shares, Warrant Exercised (in shares)
Number of stock issued for warrant exercised during the period.
Statement [Table]
Core Technology and Know-how [Member]
Represents information pertaining to Core Technology and Know-how.
Statement of Financial Position [Abstract]
Diluted (in dollars per share)
Net loss per share - diluted (in dollars per share)
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
Basic (in shares)
Shares used in per-share calculation - basic (in shares)
Accounts Payable and Accrued Liabilities Disclosure [Text Block]
amsc_DefinedContributionPlanCompanyContributionPercentageMatchCommonStock
Defined Contribution Plan, Company Contribution, Percentage Match Common Stock
Defined Contribution Plan Company Contribution Percentage Match Common Stock
Other
us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
us-gaap_EffectiveIncomeTaxRateContinuingOperations
Effective income tax rate
Other Tax Credit Carryforwards [Member]
Represents the information pertaining to other tax credit carryforwards.
Business Acquisition [Axis]
Power Quality Systems, Inc [Member]
Represents the information pertaining to Power Quality Systems, Inc.
Basic (in dollars per share)
Net loss per share - basic (in dollars per share)
Business Acquisition, Acquiree [Domain]
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]
Weighted average number of common shares outstanding
amsc_OperatingLossCarryforwardsIndefinite
Operating Loss Carryforwards Indefinite
Amount of operating loss carryforward indefinite.
Valuation allowance
amsc_DeferredTaxLiabilitiesIntercompanyDebt
Intercompany Debt
Amount of deferred tax consequences attributable to intercompany debt.
Statement of Cash Flows [Abstract]
Fixed assets and intangible assets
Amount, before allocation of valuation allowance, of deferred tax asset attributable to fixed assets and intangible assets.
True-up of NOLs
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.
GILTI
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.
The 2007 Director Plan [Member]
Represents the information pertaining to the 2007 Director Plan
Statement of Stockholders' Equity [Abstract]
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.
Income Statement [Abstract]
us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
Total other comprehensive loss, net of tax
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.
Fair value
Business Combination, Contingent Consideration, Liability, Total
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.
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
Issuance of common stock, shares (in shares)
us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Accounting Standards Update and Change in Accounting Principle [Text Block]
Foreign income tax rate differential
Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]
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]
us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Statutory federal income tax rate
Other liabilities
us-gaap_DerivativeFairValueOfDerivativeNet
Derivative, Fair Value, Net, Total
Corporate, Non-Segment [Member]
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
Total purchase consideration
us-gaap_StockholdersEquity
Total stockholders' equity
Balance
Balance
Deferred revenue, long term portion
us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Cash paid for acquisition, net of cash received
Supplier [Axis]
Class of Stock [Axis]
Supplier [Domain]
Deferred tax liability
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Cash payment
us-gaap_PaymentsToAcquireBusinessesGross
Payments to Acquire Businesses, Gross
Operating Segments [Member]
Derivative Financial Instruments, Liabilities [Member]
Property, plant and equipment
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment