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

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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+ Details

MESA LABORATORIES INC /CO/ 10-Q