Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Numerator:
Net (loss)	$ (876)	$ (595)	$ (1,863)	$ (1,445)
Denominator:
Denominator for basic and diluted earnings per share — weighted average shares	21,043	22,405	21,043	22,515
Net (loss) per share:
Basic and diluted (loss) per share	$ (0.04)	$ (0.03)	$ (0.09)	$ (0.06)