Commitments and Contingencies - Additional Information (Detail)	1 Months Ended	12 Months Ended
	Jun. 30, 2015 ft²	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)
Operating Leased Assets [Line Items]
Non-cancelable operating lease agreements, expiration dates		From 2017 through 2023
Deferred rent		$ 5,100,000	$ 4,900,000
Rent expense, net of sublease income, for operating leases		6,400,000	5,200,000	$ 4,700,000
Offset of rent expense and sublease income		31,000.0	700,000	$ 700,000
Future minimum sublease income under non-cancelable operating leases		200,000
Purchase commitments		11,900,000	$ 3,600,000
Accrued loss		$ 0
California [Member]
Operating Leased Assets [Line Items]
Operating lease agreements, lease term	8 years
Operating lease agreements, area leased | ft²	14,067
Operating lease agreements, additional area leased | ft²	42,201