Property and Equipment - Summary of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Total property and equipment, gross	$ 185	$ 89
Less: accumulated depreciation	(20)	(8)
Total property and equipment, net	165	81
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Total property and equipment, gross	27	7
Construction in Progress
Property Plant And Equipment [Line Items]
Total property and equipment, gross	39	58
Leasehold Improvements
Property Plant And Equipment [Line Items]
Total property and equipment, gross	32	$ 24
Lab Equipment
Property Plant And Equipment [Line Items]
Total property and equipment, gross	$ 87