Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Numerator:
Net (loss) income for basic and diluted earnings per share	$ (968)	$ 1,893
Denominator:
Denominator for basic earnings per share — weighted average shares	27,130	27,130
Effect of dilutive securities on denominator:
Options	0	0
Denominator for diluted earnings per share — weighted average shares and assumed conversions	27,130	27,130
Net (loss) income per share:
Basic and diluted (loss) income per share	$ (0.04)	$ 0.07