v3.26.1
Share-based compensation - Share options outstanding - DSPPP (Details) - Deferred Strike Price Payment Plan (DSPPP) - EquityInstruments
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Share-based compensation        
Outstanding shares 29,904,690 29,950,268 29,958,807 17,438,883
Later than seven years and not later than eight years        
Share-based compensation        
Outstanding shares 17,412,752 17,427,207    
Later than eight years and not later than nine years        
Share-based compensation        
Outstanding shares 12,491,938 12,523,061    
Strike Price CHF 0.043        
Share-based compensation        
Outstanding shares 12,491,938 12,523,061    
Strike Price CHF 0.043 | Later than eight years and not later than nine years        
Share-based compensation        
Outstanding shares 12,491,938 12,523,061    
Strike Price CHF 0.13        
Share-based compensation        
Outstanding shares 17,412,752 17,427,207    
Strike Price CHF 0.13 | Later than seven years and not later than eight years        
Share-based compensation        
Outstanding shares 17,412,752 17,427,207