Property and Equipment, Net - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Property and equipment, at cost	$ 78,917	$ 54,512
Less: Accumulated depreciation	(15,472)	(7,737)
Property and equipment, net	63,445	46,775
Laboratory Equipment
Property Plant And Equipment [Line Items]
Property and equipment, at cost	41,585	26,958
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, at cost	26,109	15,598
Construction In Progress
Property Plant And Equipment [Line Items]
Property and equipment, at cost	10,293	11,180
Computer Equipment, Software and Other
Property Plant And Equipment [Line Items]
Property and equipment, at cost	$ 930	$ 776