v3.26.1
Shareholders' equity - Performance unit plans (Details)
12 Months Ended
Mar. 25, 2024
EquityInstruments
Mar. 25, 2024
shares
May 25, 2023
EUR (€)
EquityInstruments
€ / shares
Dec. 31, 2025
EUR (€)
Dec. 31, 2024
EUR (€)
EquityInstruments
shares
Dec. 31, 2023
EUR (€)
EquityInstruments
Shareholders' equity            
Outstanding, Beginning balance         1,410,814 790,600
Issued           1,060,000
Exercised           (363,000)
Forfeited / Lapsed           (76,786)
Outstanding, Ending balance       0   1,410,814
PAGUP 2023            
Shareholders' equity            
Reference price | € / shares     € 2.6      
Outstanding, Beginning balance         300,000  
Issued     300,000     300,000
Converted | shares         (300,000)  
Outstanding, Ending balance           300,000
Vesting period (year)     4 years      
Fair value per instrument at grant date | €     € 2.6      
Maximum shareholding in entity to be legally allowed to participate in plan     10.00%   10.00%  
Minimum period to hold less than threshold value of shares to become eligible for participation in plan     1 year      
Expense from share-based payment transactions | €         € 50,000 € 122,000
Frederic Cren | PAGUP 2023            
Shareholders' equity            
Issued   300,000 300,000      
Converted | shares   (300,000)        
Forfeited / Lapsed (300,000) (300,000)     (300,000)  
Frederic Cren | AGA 2023-1            
Shareholders' equity            
Issued | shares   300,000