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Note 10 - Net (Loss) Earnings Per Share - Computation of Net Income Per Share, Basic & Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Net (loss) earnings available for shareholders	$ (1,974)	$ (254,246)	$ 930
Weighted average outstanding shares of common stock (in shares)	5,421	5,386	5,321
Fully diluted shares (in shares)	5,421	5,386	5,361
Basic (loss) earnings per share (in dollars per share)	$ (0.36)	$ (47.2)	$ 0.17
Diluted (loss) earnings per share (in dollars per share)	$ (0.36)	$ (47.2)	$ 0.17
Share-Based Payment Arrangement, Option [Member]
Dilutive effect of shares (in shares)	0	0	26
Unvested Stock Awards [Member]
Dilutive effect of shares (in shares)	0	0	14

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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