v3.26.1
Fair value measurement (Details 1) - Veraxa Biotech A G [Member] - SFr / shares
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Entity Information [Line Items]    
Stock price SFr 54.60 SFr 36.44
Volatility 75.00%
Risk free rate of retturn 4.20%
Expected term (in years)   1 year