Income Taxes - Reconciliation of the Financial Statement Recognition and Measurement of Unrecognized Tax Positions During the Current Fiscal Year (Detail) (USD $)	12 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Balance as of March 31, 2014	$ 700,000
Additions based on tax positions related to the current year	1,499,000
Additions for tax positions of prior years	0
Reductions for tax positions related to the current year	(60,000)
Reductions for tax positions of prior years	(150,000)
Balance as of March 31, 2015	$ 1,989,000