v3.25.4
Post-employment benefits - Additional Information (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
USD ($)
member
Dec. 31, 2024
USD ($)
member
Dec. 31, 2023
Dec. 31, 2022
Disclosure Of Defined Benefit Plans [Line Items]        
Past service cost gain $ 0 $ 942    
Demographic assumptions increase in weighted turnover     19.50% 15.80%
Financial assumptions increase (decrease) of discount rate   0.95% 1.50%  
Average life expectancy in years after retirement for male 23 years 25 days 22 years 9 months 25 days    
Average life expectancy in years after retirement for female 24 years 9 months 21 days 24 years 7 months 2 days    
United States        
Disclosure Of Defined Benefit Plans [Line Items]        
Post-employment benefit expense, 401(k) defined contribution plan $ 300 $ 300    
Swiss Pension Plan        
Disclosure Of Defined Benefit Plans [Line Items]        
Number of active members | member 210 209    
Estimating the defined benefit obligation, the discount rates 1.10% 0.95%    
Demographic assumptions increase in expected employee salaries 2.50% 2.50%    
Weighted average modified duration 13 years 8 months 12 days 13 years 7 months 6 days    
LPP interest rate 2.30% 2.30%    
Extra mandatory part equivalent to discount rate   2.30%    
Demographic assumptions increase in expected employee turnover rate 0.75% 1.00%    
Expected employer contributions for next annual reporting period $ 1,300      
French Pension Plan        
Disclosure Of Defined Benefit Plans [Line Items]        
Number of active members | member 89 84    
Estimating the defined benefit obligation, the discount rates 4.05% 3.55%    
Demographic assumptions increase in expected employee salaries 3.00% 3.00%    
Weighted average modified duration 15 years 1 month 6 days 15 years 3 months 18 days    
Demographic assumptions increase in expected employee turnover rate 2.00% 2.00%    
Funded        
Disclosure Of Defined Benefit Plans [Line Items]        
Past service cost gain $ 0 $ 942    
Financial assumptions increase (decrease) of discount rate 1.10% 0.95%