v3.26.1
Convertible loan - (Details) - EUR (€)
1 Months Ended 12 Months Ended
Apr. 30, 2025
Dec. 31, 2025
Dec. 31, 2023
Disclosure of financial assets [line items]      
Cost at January 1   € 3,494,788,000  
Cost at December 31   3,133,264,000  
Fair value adjustment for the year   1,175,000 € (390,000)
Convertible Loan   21,175,000  
Convertible loan      
Disclosure of financial assets [line items]      
Acquisition of the year   20,000,000  
Cost at December 31   20,000,000  
Fair value adjustment for the year   1,175,000  
Fair value adjustment at December 31   1,175,000  
Convertible Loan   € 21,175,000  
Interest rate receivable per annum at maturity date   8.00%  
Convertible loan | Minimum      
Disclosure of financial assets [line items]      
minimum subscription to be done by third party as condition of conversion of loan into preferred equity shares   € 20,000,000  
Onco3R      
Disclosure of financial assets [line items]      
Acquisition of the year € 20,000,000    
Convertible Loan € 20,000,000