Property and Equipment Net - Summary of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Total property and equipment, gross	$ 3,070	$ 89
Less: accumulated depreciation	(107)	(8)
Total property and equipment, net	2,963	81
Computers
Property Plant And Equipment [Line Items]
Total property and equipment, gross	96
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Total property and equipment, gross	315	7
Lab Equipment
Property Plant And Equipment [Line Items]
Total property and equipment, gross	1,366
Leasehold Improvements
Property Plant And Equipment [Line Items]
Total property and equipment, gross	296	24
Construction in Progress
Property Plant And Equipment [Line Items]
Total property and equipment, gross	$ 997	$ 58