Property and Equipment - Composition of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 13,561	$ 10,350
Less accumulated depreciation	(3,182)	(2,126)
Property and equipment, net	10,379	8,224
Lab equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	12,244	8,994
Computer hardware, software and telephone
Property, Plant and Equipment [Line Items]
Property and equipment, gross	140	140
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	114	107
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	77	67
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 986	$ 1,042

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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