Financial Statements Details - Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Balance Sheet Components [Abstract]
Accrued payroll related costs	$ 55,422	$ 56,626
Accrued manufacturing costs	21,282	35,703
Accrued product development costs	7,552	21,201
Accrued warranty costs	10,115	7,415	$ 8,286	$ 6,744
Accrued professional fees	6,262	7,086
Accrued taxes	770	794
Other	1,705	5,002
Total accrued liabilities	$ 103,108	$ 133,827