Property and equipment, net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Property and equipment, net
Property and equipment, gross	$ 28,014		$ 28,014		$ 26,973
Less: Accumulated depreciation and amortization	(10,442)		(10,442)		(7,863)
Property and equipment, net	17,572		17,572		19,110
Depreciation expense	1,600	$ 600	3,200	$ 1,000
Laboratory equipment
Property and equipment, net
Property and equipment, gross	15,763		15,763		14,872
Laboratory equipment was not yet placed in service	400		400		2,300
Leasehold improvements
Property and equipment, net
Property and equipment, gross	10,917		10,917		10,736
Computer equipment and software
Property and equipment, net
Property and equipment, gross	484		484		441
Furniture and office equipment
Property and equipment, net
Property and equipment, gross	$ 850		$ 850		$ 924