Intangible assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Cost	$ 38,600	$ 38,600
Accumulated amortization	(31,298)	(28,708)
Net	7,302	9,892
Developed technology
Finite-Lived Intangible Assets [Line Items]
Cost	30,100	30,100
Accumulated amortization	(30,100)	(28,218)
Net	0	1,882
In-licensed rights
Finite-Lived Intangible Assets [Line Items]
Cost	8,500	8,500
Accumulated amortization	(1,198)	(490)
Net	$ 7,302	$ 8,010