Share capital - Follow-On Offering (Details) - Follow on Offering SFr in Millions, $ in Millions |
Dec. 19, 2023
USD ($)
shares
|
Dec. 19, 2023
CHF (SFr)
shares
|
|---|---|---|
| Share capital | ||
| Number of shares issued during the period | shares | 14,300,000 | 14,300,000 |
| Issuance costs | SFr 3.3 | |
| Net proceeds from issuance of shares | 40.5 | |
| Proceeds from issue of ordinary shares | $ 50.1 | SFr 43.8 |