Financial Statements Details - Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Balance Sheet Components [Abstract]
Accrued payroll related costs	$ 55,957	$ 70,755
Accrued manufacturing costs	30,318	31,336
Accrued product development costs	12,189	6,988
Accrued professional fees	6,312	5,678
Accrued warranty costs	5,074	5,362	$ 8,182	$ 7,415
Other	4,048	3,135
Total accrued liabilities	$ 113,898	$ 123,254