Balance Sheet Components - Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Balance Sheet Components [Abstract]
Accrued compensation costs	$ 44,477	$ 52,854
Accrued warranty costs	8,286	6,744	$ 5,597	$ 4,718
Accrued manufacturing costs	25,592	14,824
Accrued professional fees	6,666	6,829
Accrued taxes	1,315	1,098
Other	8,123	8,602
Total accrued liabilities	$ 94,459	$ 90,951