Balance Sheet Components - Warranty Accrual (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Warranty [Roll Forward]
Warranty accrual, beginning of period	$ 4,718	$ 3,204
Liabilities accrued for warranties issued during the period	1,438	1,602
Warranty costs incurred during the period	(1,018)	(834)
Adjustments related to change in estimate	(297)	0
Warranty accrual, end of period	$ 4,841	$ 3,972
Hardware
Guarantor Obligations [Line Items]
Warranty period	1 year
Software embedded in products
Guarantor Obligations [Line Items]
Warranty period	90 days