Note 2 - Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Numerator:
Net (loss)	$ (565)	$ (1,077)
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)	$ (0.03)	$ (0.05)