Income taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Current:
Federal	$ (3,072)	$ 2,762	$ 1,385
Cantonal (Zug)	516	1,100	778
Non-Swiss	2,533	33,603	13,140
Total current	(23)	37,465	15,303
Deferred:
Swiss	0	0	0
Non-Swiss	0	0	0
Total deferred	0	0	0
Total income tax provision	$ (23)	$ 37,465	$ 15,303