Intangible assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Cost	$ 11,089	$ 5,000
Accumulated amortization	(651)	(132)
Impairment	0	0
Net	10,438	4,868
In-licensed rights
Finite-Lived Intangible Assets [Line Items]
Cost	11,089	5,000
Accumulated amortization	(651)	(132)
Impairment	0	0
Net	$ 10,438	$ 4,868