Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Property Subject to or Available for Operating Lease [Line Items]
Non-cancelable operating lease agreements, expiration dates	From 2015 through 2023
Deferred rent	$ 4,900,000	$ 3,900,000
Rent expense, net of sublease income, for operating leases	5,200,000	4,700,000	1,100,000
Offset of rent expense and sublease income	700,000	700,000	23,000
Purchase commitments	3,600,000	600,000
Accrued loss	0
March 31, 2016 [Member]
Property Subject to or Available for Operating Lease [Line Items]
Future minimum sublease income under non-cancelable operating leases	$ 34,000