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Note 7 - Indebtedness - Interest Expense on the Notes (Details) - The Notes [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Coupon interest expense at 1.375%	$ 593	$ 593	$ 1,186	$ 1,186
Amortization of debt discounts and issuance costs	227	222	452	443
Total interest and amortization of debt issuance costs	$ 820	$ 815	$ 1,638	$ 1,629

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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