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Note 3 - Revenue Recognition - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Unbilled AR, ending balance | $ 9,958 | $ 6,492
Deferred Program Costs, ending balance | 2,136 | 858
Contract Liabilities, ending balance | 50,760 | 30,034
Deferred Program Costs, increases for costs incurred to fulfill performance obligations | 4,411 | 2,476
Unbilled AR, increase (decrease) due to customer billings | (20,392) | (14,373)
Increase (decrease) due to customer billings | 77,685 | 77,489
Deferred Program Costs, decrease due to cost recognition on completed performance obligations | (4,021) | (1,189)
Unbilled AR, increase (decrease) due to recognition of revenue based on transfer of control of performance obligations | 16,572 | 17,839
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations | (70,529) | (56,643)
Other changes and foreign currency exchange impact | 12 | 0
Deferred Program Costs, Other changes and foreign currency exchange impact | (3) | (9)
Contract Liabilities, Other changes and foreign currency exchange impact | (87) | (120)
Unbilled AR, ending balance | 6,150 | 9,958
Deferred Program Costs, ending balance | 2,523 | 2,136
Contract Liabilities, ending balance | $ 57,829 | $ 50,760

X
- Definition Represents the change in contract costs attributable to deferred program costs related to contract with customer. + References No definition available. + Details
Name: | amsc_ContractWithCustomerAssetDeferredProgramCostsChangeInContractCosts
Namespace Prefix: | amsc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount of contract costs recognized from deferred program costs, with regard to asset from contract with customer. + References No definition available. + Details
Name: | amsc_ContractWithCustomerAssetDeferredProgramCostsContractCostsRecognized
Namespace Prefix: | amsc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the net deferred program costs related to contract with customer. + References No definition available. + Details
Name: | amsc_ContractWithCustomerAssetDeferredProgramCostsNet
Namespace Prefix: | amsc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the change in the asset from contract with customer, attributable to other changes in deferred program costs. + References No definition available. + Details
Name: | amsc_ContractWithCustomerAssetDeferredProgramCostsOtherChanges
Namespace Prefix: | amsc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the revenue recognized from performance obligation satisfied from change in time frame of unbilled AR related to contract with customer. + References No definition available. + Details
Name: | amsc_ContractWithCustomerAssetUnbilledARChangeInTimeFramePerformanceObligationSatisfiedRevenueRecognized
Namespace Prefix: | amsc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the net unbilled AR related to contract with customer. + References No definition available. + Details
Name: | amsc_ContractWithCustomerAssetUnbilledARNet
Namespace Prefix: | amsc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents changes in the asset from contract with customer from other changes pertaining to unbilled accounts receivable. + References No definition available. + Details
Name: | amsc_ContractWithCustomerAssetUnbilledAROtherChanges
Namespace Prefix: | amsc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the change in the asset from the contract with customer from revenue recognized on unbilled accounts receivable. + References No definition available. + Details
Name: | amsc_ContractWithCustomerAssetUnbilledARRevenueRecognized
Namespace Prefix: | amsc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents other changes in the liability from contract with customer. + References No definition available. + Details
Name: | amsc_ContractWithCustomerLiabilityOtherChanges
Namespace Prefix: | amsc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-2 + Details
Name: | us-gaap_ContractWithCustomerLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of revenue recognized arising from contract liability from change in timeframe for performance obligation to be satisfied. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 + Details
Name: | us-gaap_ContractWithCustomerLiabilityChangeInTimeframePerformanceObligationSatisfiedRevenueRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 + Details
Name: | us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration