Leasehold Improvements and Equipment, Net - Composition of Leasehold Improvements and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Leasehold improvements and equipment, gross	$ 7,547	$ 6,860
Less: Accumulated depreciation	(4,544)	(3,654)
Leasehold improvements and equipment, net	3,003	3,206
Laboratory equipment
Property, Plant and Equipment [Line Items]
Leasehold improvements and equipment, gross	3,281	2,967
Leasehold improvements
Property, Plant and Equipment [Line Items]
Leasehold improvements and equipment, gross	2,387	2,357
Computer equipment
Property, Plant and Equipment [Line Items]
Leasehold improvements and equipment, gross	814	751
Implementation costs - cloud computing arrangements
Property, Plant and Equipment [Line Items]
Leasehold improvements and equipment, gross	771	582
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Leasehold improvements and equipment, gross	203	201
Construction in progress
Property, Plant and Equipment [Line Items]
Leasehold improvements and equipment, gross	$ 91	$ 2