Balance Sheet Components - Standard Product Warranty Liability (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Movement in Standard Product Warranty Accrual [Roll Forward]
Accrued warranty beginning balance	$ 10,154	$ 9,881
Accrued warranty, net	(3,224)	(5,944)
Warranty expenditures during the year	(1,114)	(5,671)
Accrued warranty ending balance	$ 5,816	$ 10,154