Balance Sheets Components - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Aug. 04, 2020
Payables And Accruals [Abstract]
Accrued payroll and related benefits	$ 4,954	$ 5,362
Price adjustment and other revenue reserves	3,867	3,063
Short term lease liability	1,035	1,264
Other accrued expenses	2,860	3,274
Total accrued expenses and other current liabilities	$ 12,716	$ 12,963	$ 500