v3.26.1
Intangible assets - Narrative (Details) - EUR (€)
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Intangible assets        
Intangible assets € 48,016,000 € 51,407,000 € 50,108,000  
Amortisation intangible assets other than goodwill 2,200,000 456,000    
Development cost        
Intangible assets        
Intangible assets 47,657,000 51,005,000    
Gross value        
Intangible assets        
Intangible assets 56,112,000 55,504,000 55,958,000 € 54,001,000
Additions 154,000 1,507,000    
Gross value | Development cost        
Intangible assets        
Intangible assets 55,521,000 54,913,000 € 55,367,000 € 53,410,000
Additions € 154,000 € 1,507,000