Note 9 - Net Loss Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Numerator:
Net (loss)	$ (1,360)	$ (3,626)
Weighted average shares outstanding
Basic (in shares)	21,042,652	21,042,652
Net loss per share:
Basic loss per share (in dollars per share)	$ (0.06)	$ (0.17)