v3.25.4
Intangible assets (Details)
SFr in Thousands
Dec. 31, 2025
CHF (SFr)
Dec. 31, 2024
CHF (SFr)
Disclosure of intangible assets material to entity [abstract]    
Intangible Assets SFr 50,416 SFr 50,416
Gross Carrying Amount    
Disclosure of intangible assets material to entity [abstract]    
Intangible Assets 50,416 50,416
Acquired IPR&D Asset    
Disclosure of intangible assets material to entity [abstract]    
Intangible Assets SFr 50,416 SFr 50,416
Acquired IPR&D Asset | Discount rate, measurement input    
Disclosure of intangible assets material to entity [abstract]    
Discount rate 0.16 0.17
Acquired IPR&D Asset | Gross Carrying Amount    
Disclosure of intangible assets material to entity [abstract]    
Intangible Assets SFr 50,416 SFr 50,416