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Note 6 - Indebtedness - Carrying Amount of the Notes (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
Total principal remaining	$ 69,375
The Notes [Member] | Senior Notes [Member]
Principal outstanding	0	$ 97,500
Unamortized debt issuance costs	0	(203)
Total principal remaining	$ 0	$ 97,297

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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