Income taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current:
Swiss	$ 3,862	$ 2,163	$ 469
Non-Swiss	33,603	13,140	10,219
Total current	37,465	15,303	10,688
Deferred:
Swiss	0	0	0
Non-Swiss	0	0	0
Total deferred	0	0	0
Income tax expenses	$ 37,465	$ 15,303	$ 10,688