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Note 3 - Revenue Recognition 1 (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenue, Performance Obligation Satisfied, Revenue Recognized, Percentage	80.00%
Contract With Customer Loss Accrual Reduction		$ 2.7
Revenue Benchmark [Member] | Geographic Concentration Risk [Member] | Non-US [Member]
Concentration Risk, Percentage	37.00%	45.00%
Minimum [Member]
Warranty Period (Year)	1 year
Contract with Customer, Payment Term (Day)	30 days
Maximum [Member]
Warranty Period (Year)	3 years
Extended Service Warranty, Term (Year)	4 years
Contract with Customer, Payment Term (Day)	60 days

X

- Definition

The amount of contract with customer loss accrual reduction.

+ References

No definition available.

+ Details

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Namespace Prefix:	amsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents the payment term, from the date of delivery, under contracts with customers.

+ References

No definition available.

+ Details

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Namespace Prefix:	amsc_
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Balance Type:	na
Period Type:	duration

X

- Definition

Represents the additional term of extended service-type warranties.

+ References

No definition available.

+ Details

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

X

- Definition

Represents the percentage of revenue recognized at the point of time when control transferred to the customer.

+ References

No definition available.

+ Details

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Namespace Prefix:	amsc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the typical term of assurance-type warranties on all product sales.

+ References

No definition available.

+ Details

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X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-42

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
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-Section 50
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-Publisher FASB
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 275
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-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-20

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- Details

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X

- Details

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X

- Details

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