Balance Sheet Components - Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2012
Balance Sheet Components [Abstract]
Accrued payroll related costs	$ 23,178	$ 30,749
Accrued warranty costs	3,972	3,204	$ 3,564	$ 5,075
Accrued manufacturing costs	6,762	1,089
Accrued professional fees	6,346	2,354
Accrued taxes	1,065	1,577
Other	2,024	1,396
Total accrued liabilities	$ 43,347	$ 40,369