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, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Numerator:
Net income (loss)	$ 165	$ (710)	$ 111	$ (589)
Denominator:
Denominator for basic and diluted earnings per share — weighted average shares	27,130	27,130	27,130	27,130
Basic and diluted income (loss) per share	$ 0.01	$ (0.03)	$ 0.00	$ (0.02)