v3.26.3
Share-based payments - Narrative (Details)
€ in Thousands
1 Months Ended 3 Months Ended 4 Months Ended 6 Months Ended 115 Months Ended 127 Months Ended
Mar. 05, 2026
EUR (€)
shares
Feb. 28, 2026
shares
Apr. 30, 2025
shares
Jan. 31, 2025
shares
Jun. 30, 2026
EUR (€)
May 31, 2026
shares
Jun. 30, 2026
EUR (€)
shares
Jun. 30, 2026
shares
Jun. 30, 2026
shares
Mar. 31, 2026
shares
Disclosure of terms and conditions of share-based payment arrangement [line items]                    
Unused reversals | €             € 1,787      
AGA EMPLOYER CONTRIBUTIONS AND TAXES                    
Disclosure of terms and conditions of share-based payment arrangement [line items]                    
Expense from share-based payment transactions with employees | € € 2,256                  
Unused reversals | €         € 1,736   € 1,736      
BSAs                    
Disclosure of terms and conditions of share-based payment arrangement [line items]                    
Number of instruments issued (in shares)   23,477 39,370 125,000     23,477 314,867    
BSAs | Board member                    
Disclosure of terms and conditions of share-based payment arrangement [line items]                    
Vesting percentage   25.00% 25.00% 25.00%            
Vesting period   4 years 4 years 4 years            
AGAs                    
Disclosure of terms and conditions of share-based payment arrangement [line items]                    
Number of shares waived (in shares)                   77,050
Number of shares with performance conditions waived (in shares)                   40,200
Number of shares lapsed (in shares)                   217,750
Expense from share-based payment transactions with employees | €             € 11,619      
AGAs | Settlement agreement (Protocole d’accord transactionnel)                    
Disclosure of terms and conditions of share-based payment arrangement [line items]                    
Number of shares waived (in shares) 117,250                  
Total AGAs                    
Disclosure of terms and conditions of share-based payment arrangement [line items]                    
Number of instruments issued (in shares)             502,562   11,063,460  
Total AGAs | Tranche 1                    
Disclosure of terms and conditions of share-based payment arrangement [line items]                    
Vesting percentage           50.00%        
Vesting period           2 years        
Total AGAs | Tranche 2                    
Disclosure of terms and conditions of share-based payment arrangement [line items]                    
Vesting percentage           25.00%        
Vesting period           3 years        
Total AGAs | Tranche 3                    
Disclosure of terms and conditions of share-based payment arrangement [line items]                    
Vesting percentage           25.00%        
Vesting period           4 years        
AGA-2026-1                    
Disclosure of terms and conditions of share-based payment arrangement [line items]                    
Number of instruments issued (in shares)           47,500        
AGA-2026-2                    
Disclosure of terms and conditions of share-based payment arrangement [line items]                    
Number of instruments issued (in shares)           294,476        
AGA-2026-3                    
Disclosure of terms and conditions of share-based payment arrangement [line items]                    
Number of instruments issued (in shares)           1,619        
AGA-2026-4                    
Disclosure of terms and conditions of share-based payment arrangement [line items]                    
Number of instruments issued (in shares)           41,717