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Income Taxes - Reconciliation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Income tax reconciliation, amount      
Statutory Tax Rate $ (22,316)    
Changes in Unrecognized Tax Benefits (10,949)    
Total benefit (provision) for income taxes $ (29,863) $ (7,041) $ 30,736
Tax Jurisdiction of Domicile [Extensible Enumeration] UK    
Income tax reconciliation, percent      
Statutory income tax rate, percent 25.00% 25.00%  
Tax rate difference, percent   (21.60%) (103.10%)
State taxes net of federal, percent   (2.00%) (7.90%)
Foreign-Derived Intangible Income ("FDII"), percent   2.20% 13.80%
Uncertain tax positions, percent   (31.90%)  
Research and development tax credits, percent   8.90% 13.70%
Share-based compensation, percent   4.80% (7.40%)
Other Adjustments, percent   (2.60%) (4.70%)
Changes in valuation allowance, percent   (1657.70%) (159.80%)
Changes in Unrecognized Tax Benefits, percent 12.30%    
IP transfers and allocation   1655.40% 258.60%
Inventory allocation     181.40%
Effective income tax rate 33.50% (19.50%) 184.60%
UK      
Income tax reconciliation, amount      
Other $ 1,152    
Income tax reconciliation, percent      
Other Adjustments, percent (1.30%)    
United States      
Income tax reconciliation, amount      
Tax rate difference $ 714    
State and local income taxes $ 342    
Effective Income Tax Rate Reconciliation, State and Local Jurisdiction, Contribution Greater than 50 Percent, Tax Effect [Extensible Enumeration] stpr:MA    
Research and development tax credits $ 3,509    
Share-based compensation 6,569    
Other $ (1,035)    
Income tax reconciliation, percent      
Tax rate difference, percent (0.80%)    
State taxes net of federal, percent (0.40%)    
Research and development tax credits, percent (3.90%)    
Share-based compensation, percent (7.40%)    
Other Adjustments, percent 1.20%    
Switzerland      
Income tax reconciliation, amount      
Tax rate difference $ 5,576    
State and local income taxes 3,439    
Changes in valuation allowance (10,464)    
Enacted changes in tax laws or rates (7,296)    
Other $ 899    
Income tax reconciliation, percent      
Tax rate difference, percent (6.20%)    
State taxes net of federal, percent (3.90%)    
Other Adjustments, percent (1.00%)    
Changes in valuation allowance, percent 11.70%    
Enacted changes in tax laws or rates, percent 8.20%    
Other foreign jurisdictions      
Income tax reconciliation, amount      
Other $ (3)