Goodwill and Purchased Intangibles Assets - Schedule of Purchased Intangible Assets Subject to Amortization (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2015	Mar. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 2,800	$ 2,800
Accumulated Amortization	(754)	(500)
Net Carrying Amount	2,046	2,300
Developed Technology Rights [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,400	2,400
Accumulated Amortization	(600)	(400)
Net Carrying Amount	$ 1,800	$ 2,000
Remaining Useful Life (In years)	2 years 3 months	2 years 6 months
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 100	$ 100
Accumulated Amortization	(39)	(25)
Net Carrying Amount	$ 61	$ 75
Remaining Useful Life (In years)	1 year 3 months	1 year 6 months
Other Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 300	$ 300
Accumulated Amortization	(115)	(75)
Net Carrying Amount	$ 185	$ 225
Remaining Useful Life (In years)	1 year 3 months	1 year 6 months