v3.26.1
General information - Narrative (Details)
€ in Millions
1 Months Ended 6 Months Ended
Apr. 30, 2026
EUR (€)
Mar. 31, 2026
Jun. 30, 2026
EUR (€)
employee
vaccine
adult
Jun. 30, 2025
employee
Disclosure Of General Information [Line Items]        
Number of travel vaccines | vaccine     3  
Number of employees | employee     634 704
Number of adults vaccinated | adult     50,000  
Reserve offering, amount € 84.0      
Proceeds from issuing shares 37.0   € 37.0  
Maximum        
Disclosure Of General Information [Line Items]        
Potential proceeds from exercise of warrants € 47.0      
Maximum | Forecast        
Disclosure Of General Information [Line Items]        
Reduction in global workforce, percentage     15.00%  
Minimum | Forecast        
Disclosure Of General Information [Line Items]        
Reduction in global workforce, percentage     10.00%  
IXIARO, IXCHIQ and DUKORAL        
Disclosure Of General Information [Line Items]        
Number of commercial vaccines | vaccine     3  
Lyme VLA15        
Disclosure Of General Information [Line Items]        
Vaccine efficacy rate   70.00%    
Confidence interval level, percentage   95.00%