Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Numerator:
Net (loss)	$ (850)	$ (890)
Denominator:
Denominator for basic and diluted earnings per share — weighted average shares	22,625	27,061
Net (loss) per share:
Basic and diluted (loss) per share	$ (0.04)	$ (0.03)