Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Numerator:
Net income (loss)	$ 448	$ (66)	$ 559	$ (655)
Denominator:
Denominator for basic and diluted earnings per share — weighted average shares	27,129	27,130	27,130	27,130
Basic and diluted income (loss) per share	$ 0.02	$ 0.00	$ 0.02	$ (0.02)