Financial risk management - lease liabilities (Details) - CHF (SFr) |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Lease liabilities | ||
| Lease liabilities - cash outflow | SFr 38,499 | SFr 47,739 |
| Lease liabilities - carrying amount | 34,688 | 41,994 |
| Less than 1 Year | ||
| Lease liabilities | ||
| Lease liabilities - cash outflow | 9,240 | 9,240 |
| 1 to 5 Years | ||
| Lease liabilities | ||
| Lease liabilities - cash outflow | SFr 29.259 | SFr 38,499 |