Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net loss	$ (1,077)	$ (915)
Denominator:
Basic	21,043	21,043
Diluted	21,043	21,043
Net loss per share:
Basic loss per share	$ (0.05)	$ (0.04)
Diluted loss per share	$ (0.05)	$ (0.04)