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Note 2 - Revenue Recognition - Revenues by Major Customers (Details) - Revenue Benchmark [Member] - Customer Concentration Risk [Member]	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Inox Wind Limited [Member] | Wind [Member]
Inox Wind Limited	12.00%
SGL Carbon LLC [Member] | Grid [Member]
Inox Wind Limited		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
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