Leases - Additional Information (Details) $ in Millions	1 Months Ended		3 Months Ended	6 Months Ended
	Apr. 30, 2018 ft²	May 31, 2015 ft²	Jun. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)
Lessee Lease Description [Line Items]
Lease expiration period		2022-05
Additional laboratory and office facilities under lease	6,378
Increased of leased premises	36,754
Lessee operating lease extended lease term	2026-11
Lease existence of option to extend		true
Lessee operating lease option to extend		5 years
Lease expense | $			$ 0.4	$ 0.9
Cash paid for operating lease liabilities | $				$ 1.1
Operating lease, weighted average remaining lease term			4 years 5 months 1 day	4 years 5 months 1 day
Operating lease, weighted average discount rate, percent			8.00%	8.00%
South San Francisco and California
Lessee Lease Description [Line Items]
Laboratory and office facilities under lease		30,376