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Note 8 - Indebtedness - Interest Expense on the Notes (Details) - The Notes [Member] - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Coupon interest expense at 1.375%	$ 1,372	$ 2,372	$ 2,372
Amortization of debt issuance costs	546	926	907
Total	$ 1,918	$ 3,298	$ 3,279

X

- Definition

Amount of amortization expense attributable to debt discount (premium) and debt issuance costs.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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