Commitments and Contingencies - Additional Information (Details)	1 Months Ended	3 Months Ended		9 Months Ended
	Mar. 31, 2019 Extension_Option	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
Lessee Lease Description [Line Items]
Operating lease, rent expense | $		$ 264,000	$ 71,000	$ 588,000	$ 173,000
Operating lease, expiration period				2024
Irvine, California
Lessee Lease Description [Line Items]
Operating lease, term of contract	5 years
Operating lease, expiration date	Sep. 30, 2024
Operating lease, number of extension options | Extension_Option	2
Option to extend, operating lease, term	5 years
Operating lease, Existence of option to extend	true
Operating lease, rent holiday concession period	1 month
Operating lease, description				The lease includes a one-month rent holiday concession and escalation clauses for increased rent over the lease term.