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Note 4 - Fair Value Measurements (Details Textual) - Senior Notes [Member] - The Notes [Member] - USD ($) $ in Millions	Sep. 30, 2022	Mar. 31, 2022	Aug. 12, 2019
Long-term Debt, Gross	$ 172.5	$ 172.5
Debt Instrument, Interest Rate, Stated Percentage		1.375%	1.375%

X

- Definition

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.

+ References

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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