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Note 3 - Revenue Recognition - Revenues by Major Customers (Details) - Revenue Benchmark [Member] - Customer Concentration Risk [Member]	3 Months Ended		6 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Inox Wind Limited [Member] | Wind [Member]
Inox Wind Limited	12.00%	12.00%	14.00%	12.00%
Gray Construction, Inc. [Member] | Grid [Member]
Inox Wind Limited		11.00%
Gray Construction, Inc. [Member] | Grid [Member] | Maximum [Member]
Inox Wind Limited	10.00%		10.00%	10.00%

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
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-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-20

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