Other group-wide disclosures (Details) - CHF (SFr) SFr in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Disclosure of disaggregation of revenue from contracts with customers [line items] | ||||
| Research and development expense | SFr 9,610 | SFr 10,706 | SFr 19,055 | SFr 22,627 |
| Co-development agreement with Orano Med | ||||
| Disclosure of disaggregation of revenue from contracts with customers [line items] | ||||
| Research and development expense | SFr 77 | SFr 567 | SFr 425 | SFr 1,397 |