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Note 9 - Earnings Per Share - Computation of Net Income Per Share, Basic & Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Net income available for shareholders	$ 1,025	$ 4,597
Weighted average outstanding shares of common stock (in shares)	4,528	3,901
Dilutive effect of stock options (in shares)	130	175
Dilutive effect of non-vested shares (in shares)	11	10
Fully diluted shares (in shares)	4,669	4,086
Basic (in dollars per share)	$ 0.23	$ 1.18
Diluted (in dollars per share)	$ 0.22	$ 1.13

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