Share-based compensation - Share options outstanding - DSPPP (Details) - Deferred Strike Price Payment Plan (DSPPP) - EquityInstruments |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|---|---|---|---|---|
| Share-based compensation | ||||
| Outstanding shares | 29,904,690 | 29,950,268 | 29,958,807 | 17,438,883 |
| Later than seven years and not later than eight years | ||||
| Share-based compensation | ||||
| Outstanding shares | 17,412,752 | 17,427,207 | ||
| Later than eight years and not later than nine years | ||||
| Share-based compensation | ||||
| Outstanding shares | 12,491,938 | 12,523,061 | ||
| Strike Price CHF 0.043 | ||||
| Share-based compensation | ||||
| Outstanding shares | 12,491,938 | 12,523,061 | ||
| Strike Price CHF 0.043 | Later than eight years and not later than nine years | ||||
| Share-based compensation | ||||
| Outstanding shares | 12,491,938 | 12,523,061 | ||
| Strike Price CHF 0.13 | ||||
| Share-based compensation | ||||
| Outstanding shares | 17,412,752 | 17,427,207 | ||
| Strike Price CHF 0.13 | Later than seven years and not later than eight years | ||||
| Share-based compensation | ||||
| Outstanding shares | 17,412,752 | 17,427,207 |