Property and equipment, net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property and equipment, net
Property and equipment, gross	$ 27,908	$ 26,973
Less: Accumulated depreciation and amortization	(13,393)	(7,863)
Property and equipment, net	14,515	19,110
Depreciation expense	6,500	3,700	$ 1,400
Laboratory equipment
Property and equipment, net
Property and equipment, gross	15,554	14,872
Laboratory equipment was not yet placed in service	0	2,300
Leasehold improvements
Property and equipment, net
Property and equipment, gross	11,000	10,736
Computer equipment and software
Property and equipment, net
Property and equipment, gross	532	441
Furniture and office equipment
Property and equipment, net
Property and equipment, gross	$ 822	$ 924