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Note 10 - 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, 2023	Mar. 31, 2022	Mar. 31, 2021
Net earnings available for shareholders	$ 930	$ 1,871	$ 3,274
Weighted average outstanding shares of common stock (in shares)	5,321	5,212	4,975
Fully diluted shares (in shares)	5,361	5,335	5,124
Basic earnings per share (in dollars per share)	$ 0.17	$ 0.36	$ 0.66
Diluted earnings per share (in dollars per share)	$ 0.17	$ 0.35	$ 0.64
Share-Based Payment Arrangement, Option [Member]
Dilutive effect of shares (in shares)	26	100	125
Unvested Stock Awards [Member]
Dilutive effect of shares (in shares)	14	23	24

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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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