Property and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 134,611	$ 82,149
Less: Accumulated depreciation and amortization	(14,513)	(5,104)
Total property and equipment, net	120,098	77,045
Depreciation and amortization expense	13,500	4,200	$ 1,300
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	95,001	8,452
Laboratory equipment
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	27,039	17,083
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	1,610	724
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	384	178
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 10,577	$ 55,712