Income taxes - Reconciliation of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Income (loss) before income taxes	$ (131,162)	$ (191,740)	$ (81,846)
Swiss federal statutory tax rate	8.50%	8.50%	8.50%
Income taxes at Swiss rate	$ (11,149)	$ (16,298)	$ (6,957)
Change in valuation allowance	1,261,855	13,427	(14,238)
Unamortized intangible assets	(1,240,745)	0	0
Foreign taxes rate differential	16,077	10,620	25,716
Share based compensation	13,551	2,332	5,318
Research and development credits	(3,130)	(6,483)	(4,898)
Return to provision true-ups	(31)	10,854	(1,020)
Withholding Taxes	350	435	548
Effect of tax law change	647	6	5,681
Other	40	410	538
Income tax expenses	$ 37,465	$ 15,303	$ 10,688
Effective tax rate	(28.60%)	(8.00%)	(13.10%)