Balance Sheet Components - Property and Equipment, Net (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 9,567	$ 7,898
Less: Accumulated depreciation and amortization	(2,947)	(1,760)
Property and equipment, net	6,620	6,138
Equipment and automotive
Property, Plant and Equipment [Line Items]
Total property and equipment	4,004	2,959
Software
Property, Plant and Equipment [Line Items]
Total property and equipment	2,722	2,410
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	1,381	1,195
Plates and dies
Property, Plant and Equipment [Line Items]
Total property and equipment	402	244
Construction in progress
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 1,058	$ 1,090