Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Jan. 01, 2021
Loss Contingencies [Line Items]
Operating lease right-of-use assets	$ 6,134		$ 1,700
Operating lease liability	$ 4,849
Weighted average incremental borrowing rate	5.25%
Operating lease cost	$ 300
Rent expense related to operating leases		$ 200
Loss contingency, lawsuit filing date	December 23, 2020
Mountain View California [Member]
Loss Contingencies [Line Items]
Operating lease right-of-use assets	$ 1,700
Operating lease liability	$ 1,700
Operating lease remaining term	2 years 3 months
Milpitas California [Member]
Loss Contingencies [Line Items]
Operating lease right-of-use assets	$ 4,700
Operating lease liability	$ 4,600
Operating lease remaining term	6 years 1 month