Computation of Basic and Diluted Earnings Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Numerator:
Net income (loss)	$ 2,854	$ (1,381)	$ 3,552	$ 376
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 earnings (loss) per share	$ 0.11	$ (0.05)	$ 0.13	$ 0.01