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Note 10 - Indebtedness - Interest Expense on the Notes (Details) - The Notes [Member] - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Coupon interest expense at 1.375%	$ 2,372	$ 1,502
Amortization of debt discounts and issuance costs	5,397	3,314
Total	$ 7,769	$ 4,816

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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