Balance Sheet Components - Standard Product Warranty Liability (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Movement in Standard Product Warranty Accrual [Roll Forward]
Accrued warranty beginning balance	$ 9,881	$ 9,668
Cumulative effect upon adoption of ASC 606			$ 1,032
Accrued warranty, net	5,944	1,849
Warranty expenditures during the year	(5,671)	(2,668)
Accrued warranty ending balance	$ 10,154	$ 9,881