v3.26.1
Inventories - Narrative (Details) - EUR (€)
€ in Thousands
6 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Disclosure Of Inventories [Line Items]    
Inventories, write-down provision € 48,604 € 44,462
Raw materials, write-down provision 20,167 18,855
Finished goods, write-down provision € 4,473 4,089
Shelf-life period 12 months  
VLA2001    
Disclosure Of Inventories [Line Items]    
Raw materials, write-down provision € 17,200 17,200
IXIARO, DUKORAL and IXCHIQ    
Disclosure Of Inventories [Line Items]    
Raw materials and work in progress, write-down provision 26,900 23,200
Finished goods, write-down provision € 4,500 € 4,100