Significant Balance Sheet Components (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 14,353	$ 9,002
Accumulated depreciation and amortization	(7,781)	(5,024)
Total property and equipment-net	6,572	3,978
Computers and appliances
Property Plant And Equipment [Line Items]
Property and equipment, gross	7,908	6,405
Purchased software
Property Plant And Equipment [Line Items]
Property and equipment, gross	2,220	1,698
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment, gross	1,338	182
Leasehold improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 2,887	$ 717