Property and Equipment, Net - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Property and equipment, at cost	$ 60,970	$ 54,512
Less: Accumulated depreciation	(9,984)	(7,737)
Property and equipment, net	50,986	46,775
Laboratory Equipment
Property Plant And Equipment [Line Items]
Property and equipment, at cost	31,921	26,958
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, at cost	23,788	15,598
Construction In Progress
Property Plant And Equipment [Line Items]
Property and equipment, at cost	4,367	11,180
Computer Equipment, Software and Other
Property Plant And Equipment [Line Items]
Property and equipment, at cost	$ 894	$ 776