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Note 13 - Accounts Payable and Accrued Expenses (Details Textual)	3 Months Ended
	Dec. 31, 2024
Minimum [Member]
Extended Warranty Trigger Period (Year)	1 year
Maximum [Member]
Extended Warranty Trigger Period (Year)	3 years

X

- Definition

The period in which customers may extend their warranty for an additional term.

+ References

No definition available.

+ Details

Name:	amsc_ExtendedWarrantyTriggerPeriod
Namespace Prefix:	amsc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: