Composition of Certain Financial Statement Captions - Summary of Valuation Allowance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Allowance for doubtful accounts
Allowance for doubtful accounts for inventory reserve and tax valuation
Beginning balance	$ (2,055)	$ (1,934)
Charged to expense	(369)	(232)
Written-off	585	111
Charged to other	0	0
Ending balance	(1,839)	(2,055)
Inventory reserve
Allowance for doubtful accounts for inventory reserve and tax valuation
Beginning balance	(2,321)	(2,537)
Charged to expense	(6,461)	(4,387)
Written-off	4,003	4,603
Charged to other	0	0
Ending balance	(4,779)	(2,321)
Tax valuation allowance
Allowance for doubtful accounts for inventory reserve and tax valuation
Beginning balance	(303,326)	(193,256)
Charged to expense	34,496	(110,070)
Written-off	0	0
Charged to other	8,433	0
Ending balance	$ (260,397)	$ (303,326)