Retirement benefits obligations - Balance sheet (Details) - CHF (SFr) |
6 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Dec. 31, 2024 |
|
| Defined benefit plans | ||
| Net defined benefit (liability) asset | SFr (111,947) | SFr (164,251) |
| Increase (decrease) in retirement benefit obligation | (100,000) | |
| Defined benefit obligation | ||
| Defined benefit plans | ||
| Net defined benefit (liability) asset | (2,049,265) | (2,108,384) |
| Fair value of plan assets | ||
| Defined benefit plans | ||
| Net defined benefit (liability) asset | SFr 1,937,318 | SFr 1,944,133 |