v3.25.1
Goodwill and impairment of goodwill (Details) - EUR (€)
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of detailed information about intangible assets [line items]      
Goodwill € 70,010,000 € 69,557,000 € 69,813,000
Period of projected cash flow P16Y    
Terminal growth rate (50.00%)    
Discount rate 13.75% 13.72%  
Impairment € 0    
Cell Point Acquisition      
Disclosure of detailed information about intangible assets [line items]      
Goodwill 62,400,000   62,444,000
AboundBio      
Disclosure of detailed information about intangible assets [line items]      
Goodwill € 7,600,000   € 7,369,000