Cash and cash equivalents and short-term financial assets - Short-term financial assets (Details) - CHF (SFr) SFr in Thousands |
6 Months Ended | ||
|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Dec. 31, 2024 |
|
| Miscellaneous current assets [abstract] | |||
| Short-term financial assets due in one year or less | SFr 101,413 | SFr 129,214 | |
| Net proceeds from maturity of short-term financial assets | SFr 27,801 | SFr (99,006) | |