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Note 15 - Leases - Operating Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Mar. 31, 2023
Right-of-use assets	$ 2,493	$ 2,857
Total right-of-use assets	2,493	2,858
Total lease liabilities	$ 2,625	$ 2,992
Weighted-average remaining lease term (Year)	3 years 8 months 12 days	3 years 9 months 14 days
Weighted-average discount rate	8.48%	6.46%
Property and Equipment, Net [Member]
Right-of-use assets - Financing	$ 0	$ 1
Lease Liability Current Portion [Member]
Lease liabilities - ST Financing	0	1
Lease liabilities - ST Operating	696	807
Lease Liability Long Term Portion [Member]
Lease liabilities - LT Operating	$ 1,929	$ 2,184

X

- Definition

Amount of lessee's right to use underlying asset under both operating and finance lease.

+ References

No definition available.

+ Details

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Namespace Prefix:	amsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Present value of lessee's discounted obligation for lease payments from operating and finance leases.

+ References

No definition available.

+ Details

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Namespace Prefix:	amsc_
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Balance Type:	credit
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X

- Definition

Present value of lessee's discounted obligation for lease payments from finance lease, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479041/842-20-45-1

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X

- Definition

Amount, after accumulated amortization, of right-of-use asset from finance lease.

+ References

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-Topic 842
-SubTopic 20
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-Section 45
-Paragraph 1
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-Publisher FASB
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X

- Definition

Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

+ References

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-Topic 842
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-Section 45
-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479041/842-20-45-1

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X

- Definition

Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

+ References

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-Topic 842
-SubTopic 20
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-Section 45
-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479041/842-20-45-1

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X

- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

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X

- Definition

Weighted average discount rate for operating lease calculated at point in time.

+ References

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-Topic 842
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X

- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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