Note 2 - Net Income (Loss) Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2024	Dec. 31, 2023
Numerator:
Net (loss) income	$ (527)	$ (881)	$ (962)	$ (421)	$ 2,635	$ (565)	$ (2,370)	$ 1,649
Weighted average shares outstanding
Basic (in shares)	21,042,652			21,042,652			21,042,652	21,042,652
Net (loss) income per share:
Basic (loss) income per share (in dollars per share)	$ (0.03)			$ (0.02)			$ (0.11)	$ 0.08