Balance Sheet Components - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Property Plant And Equipment [Line Items]
Property and equipment – gross	$ 47,866	$ 45,507
Less: accumulated depreciation and amortization	(14,357)	(13,753)
Property and equipment – net	33,509	31,754
Computer equipment
Property Plant And Equipment [Line Items]
Property and equipment – gross	14,626	13,195
Leasehold improvements
Property Plant And Equipment [Line Items]
Property and equipment – gross	10,072	9,882
Capitalized software costs
Property Plant And Equipment [Line Items]
Property and equipment – gross	1,923	1,888
Office equipment
Property Plant And Equipment [Line Items]
Property and equipment – gross	2,505	2,336
Software And License
Property Plant And Equipment [Line Items]
Property and equipment – gross	2,302	1,768
Building leased
Property Plant And Equipment [Line Items]
Property and equipment – gross	$ 16,438	$ 16,438