v3.25.4
Financial Risk Management - Narrative (Details)
 12 Months Ended
Dec. 31, 2025
EUR (€)
Dec. 31, 2024
EUR (€)
Disclosure of detailed information about borrowings [line items]    
Borrowings € 4,872,000 € 4,582,000
Number of large institutions at which substantially all entity's cash and cash equivalents are held 5 5
Credit limits exceeded during reporting period € 0  
Currency risk    
Disclosure of detailed information about borrowings [line items]    
Foreign Currency Denominated Receivables And Trade Payable Minimum Term 30 days  
Foreign Currency Denominated Receivables And Trade Payable Maximum Term 45 days  
Interest rate risk    
Disclosure of detailed information about borrowings [line items]    
Percentage of reasonably possible increase or decrease in interest rates 10.00%  
Percentage of reasonably possible increase in interest rates 10.00%  
Increase (decrease) in profit (loss) before tax due to reasonably possible increase in interest rates € 231,000  
Percentage of reasonably possible decrease in interest rates 10.00%  
Increase (decrease) in profit (loss) before tax due to reasonably possible decrease in interest rates € (231,000)  
United States of America, Dollars | Currency risk    
Disclosure of detailed information about borrowings [line items]    
Net assets and liabilities denominated in U.S. dollars € 4,067,000 € 5,898,000
Percentage of reasonably possible weakening of foreign currency 10.00%  
Increase in net loss from reasonably possible weakening of foreign currency € (407,000) (590,000)
Percentage of reasonably possible strengthening of foreign currency 10.00%  
Past due or impaired    
Disclosure of detailed information about borrowings [line items]    
Financial assets € 0  
Fixed interest rate    
Disclosure of detailed information about borrowings [line items]    
Borrowings € 4,872,000 € 4,582,000