v3.26.1
Management and assessment of financial risks (Details)
€ in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2026
EUR (€)
Mar. 31, 2026
USD ($)
Dec. 31, 2025
EUR (€)
Mar. 31, 2025
EUR (€)
Dec. 31, 2024
EUR (€)
Disclosure of credit risk exposure [line items]          
Assets | € € 547,142   € 584,341    
Cash and cash equivalents | € € 477,423   € 516,685 € 103,576 € 144,221
United States of America, Dollars | Currency risk          
Disclosure of credit risk exposure [line items]          
Assets | $   $ 346,558      
Cash and cash equivalents | $   129,235      
Receivables due from related parties | $   201,078      
Liabilities | $   $ 1,251      
Reasonably possible change in risk variable, percent 10.00%        
Adverse change in exchange rate, impact on foreign exchange loss | € € 27,302        
Favorable change in exchange rate, impact on foreign exchange gain | € € 33,369