Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Numerator:
Net (loss)	$ (2,437)	$ (6,851)
Denominator:
Denominator for basic and diluted earnings per share — weighted average shares	21,931	25,282
Net (loss) per share:
Basic and diluted (loss) per share	$ (0.11)	$ (0.27)