Intangible assets (Details) - CHF (SFr) SFr in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Disclosure of detailed information about intangible assets [line items] | ||
| Intangible assets at beginning of period | SFr 49 | |
| Intangible assets at end of period | 2 | SFr 49 |
| Software | ||
| Disclosure of detailed information about intangible assets [line items] | ||
| Intangible assets at beginning of period | 49 | |
| Intangible assets at end of period | 2 | 49 |
| Cost | Software | ||
| Disclosure of detailed information about intangible assets [line items] | ||
| Intangible assets at beginning of period | 2,303 | 2,296 |
| Additions | 0 | 18 |
| Disposals | (58) | (11) |
| Intangible assets at end of period | 2,244 | 2,303 |
| Accumulated depreciation | Software | ||
| Disclosure of detailed information about intangible assets [line items] | ||
| Intangible assets at beginning of period | (2,254) | (2,084) |
| Amortization charge for the year | (46) | (181) |
| Disposals | 58 | 11 |
| Intangible assets at end of period | SFr (2,242) | SFr (2,254) |