Note 9 - Net Income (Loss) Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Numerator:
Net (loss) income	$ (4,731)	$ 766
Weighted average shares outstanding
Basic (in shares)	21,042,652	21,042,652
Net (loss) income per share:
Basic (loss) income per share (in dollars per share)	$ (0.22)	$ 0.04