Share capital - Conditional share capital for employee benefit plans (Details) |
Dec. 31, 2025
CHF (SFr)
SFr / shares
shares
|
|---|---|
| Conditional Share Capital [Abstract] | |
| Nominal value per share (in CHF per share) | SFr / shares | SFr 0.02 |
| Conditional share capital for employee benefit plans | |
| Conditional Share Capital [Abstract] | |
| Nominal value per share (in CHF per share) | SFr / shares | SFr 0.02 |
| Number of shares issued that have not yet been registered in commercial register | shares | 168,677 |
| Conditional share capital for employee benefit plans | Maximum | |
| Conditional Share Capital [Abstract] | |
| Maximum aggregate amount of ordinary shares | SFr | SFr 90,057.34 |
| Issuance of ordinary shares (in shares) | shares | 4,502,867 |