Property and Equipment, net - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property Plant And Equipment [Line Items]
Total property and equipment, gross	$ 7,809	$ 6,267
Less: Accumulated depreciation	(3,488)	(2,188)
Total property and equipment, net	4,321	4,079
Computer Equipment and Software
Property Plant And Equipment [Line Items]
Total property and equipment, gross	22	22
Laboratory Equipment
Property Plant And Equipment [Line Items]
Total property and equipment, gross	6,540	5,580
Leasehold Improvements
Property Plant And Equipment [Line Items]
Total property and equipment, gross	947	657
Construction in Progress
Property Plant And Equipment [Line Items]
Total property and equipment, gross	$ 300	$ 8