Goodwill and Purchased Intangibles Assets - Schedule of Estimated Future Amortization Expense (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
2016 (remaining 3 months)	$ 467
2017	1,733
2018	1,233
2019	486
Net Carrying Amount	$ 3,919	$ 2,300