Balance Sheet Components - Estimated Future Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Remaining 2017	$ 1,391
2018	5,562
2019	4,782
2020	3,818
2021	3,772
Thereafter	678
Net	20,003	$ 23,581
Cost of revenue [Member]
Finite-Lived Intangible Assets [Line Items]
Remaining 2017	1,333
2018	5,332
2019	4,552
2020	3,772
2021	3,772
Thereafter	678
Net	19,439
Operating expenses [Member]
Finite-Lived Intangible Assets [Line Items]
Remaining 2017	58
2018	230
2019	230
2020	46
2021	0
Thereafter	0
Net	$ 564