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Note 9 - Net Earnings Per Share - Computation of Net Income Per Share, Basic & Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Net income	$ 2,116	$ 451	$ 337	$ 319
Weighted average outstanding shares of common stock (in shares)	5,393	5,339	5,384	5,312
Fully diluted shares (in shares)	5,396	5,360	5,394	5,354
Basic earnings per share (in dollars per share)	$ 0.39	$ 0.08	$ 0.06	$ 0.06
Diluted earnings per share (in dollars per share)	$ 0.39	$ 0.08	$ 0.06	$ 0.06
Share-Based Payment Arrangement, Option [Member]
Dilutive effect of shares (in shares)	0	17	1	28
Restricted Stock Units (RSUs) [Member]
Dilutive effect of shares (in shares)	3	4	9	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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