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Property and Equipment, net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property and equipment disclosures
Total property and equipment	$ 25,115	$ 18,091
Less: accumulated depreciation	(11,095)	(7,204)
Property and equipment, net	14,020	10,887
Depreciation expense	3,959	2,830	$ 3,254
Laboratory equipment
Property and equipment disclosures
Total property and equipment	18,433	14,571
Leasehold improvements
Property and equipment disclosures
Total property and equipment	4,967	1,042
Computer equipment
Property and equipment disclosures
Total property and equipment	858	858
Construction-in-progress
Property and equipment disclosures
Total property and equipment	500	1,336
Furniture and office equipment
Property and equipment disclosures
Total property and equipment	239	166
Software
Property and equipment disclosures
Total property and equipment	$ 118	$ 118

X

- Definition

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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