Note 5 - Earnings Per Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Net loss from continuing operations attributable to common shareholders	$ (802)	$ (1,482)	$ (1,588)	$ (6,843)
Net income from discontinued operations attributable to common shareholders	50	801	88	2,860
Net loss attributable to common shareholders	$ (752)	$ (681)	$ (1,500)	$ (3,983)
Denominator for basic loss per share - weighted-average shares outstanding (in shares)	6,754	6,654	6,731	6,701
Dilutive effect of stock options (in shares)	0	5	0	5
Denominator for diluted earnings per share from discontinued operations (in shares)	6,754	6,659	6,731	6,706
Basic (in dollars per share)	$ (0.12)	$ (0.22)	$ (0.24)	$ (1.02)
Diluted (in dollars per share)	(0.12)	(0.22)	(0.24)	(1.02)
Basic (in dollars per share)	0.01	0.12	0.01	0.43
Diluted (in dollars per share)	0.01	0.12	0.01	0.43
Basic (in dollars per share)	(0.11)	(0.1)	(0.22)	(0.59)
Diluted (in dollars per share)	$ (0.11)	$ (0.1)	$ (0.22)	$ (0.59)