Financial Statements Details - Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Balance Sheet Components [Abstract]
Accrued payroll related costs	$ 45,117	$ 70,755
Accrued manufacturing costs	25,968	31,336
Accrued product development costs	15,292	6,988
Accrued warranty costs	5,126	5,362	$ 7,434	$ 7,415
Accrued professional fees	8,652	5,678
Accrued taxes	889	839
Other	3,184	2,296
Total accrued liabilities	$ 104,228	$ 123,254