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, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Numerator:
Net (loss) income	$ (66)	$ 2,854	$ (655)	$ 3,552
Denominator:
Denominator for basic earnings per share — weighted average shares	27,130	27,130	27,130	27,130
Effect of dilutive securities on denominator:
Options (computed using the treasury stock method)	0	0	0	0
Denominator for diluted earnings per share — weighted average shares and assumed conversions	27,130	27,130	27,130	27,130
Basic and diluted (loss) earnings per share	$ 0.00	$ 0.11	$ (0.02)	$ 0.13