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 |