Fair value measurement (Details) - Level 3 Of Fair Values Hierarchy [Member] - Veraxa Biotech A G [Member] - CHF (SFr) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| S A Rs Liability [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Fair value liability, beginning | SFr 33,192,793 | SFr 17,784,920 |
| Share based compensation | 15,795,532 | 7,248,741 |
| Fair value adjustment | 22,761,218 | 8,159,132 |
| Fair value liability, ending | 71,749,543 | 33,192,793 |
| Contingent Liability [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Fair value liability, beginning | 2,099,705 | 1,625,167 |
| Fair value adjustment | 799,168 | 474,538 |
| Fair value liability, ending | SFr 2,898,873 | SFr 2,099,705 |