v3.26.1
Financial liabilities - Kreos / Claret Financing (Details)
€ in Thousands
3 Months Ended
Dec. 23, 2025
EUR (€)
Nov. 28, 2025
EUR (€)
Nov. 25, 2025
EUR (€)
shares
Aug. 28, 2025
EUR (€)
shares
Aug. 06, 2025
EUR (€)
shares
Jul. 30, 2025
EUR (€)
shares
Nov. 02, 2023
shares
Aug. 20, 2023
EUR (€)
tranche
shares
Mar. 31, 2026
EUR (€)
shares
Mar. 31, 2025
EUR (€)
Jul. 31, 2025
EUR (€)
Disclosure of detailed information about borrowings [line items]                      
Exercises of share warrants (in shares) | shares                 2,540    
Increase (decrease) through exercise of warrants, equity                 € 23 € 250  
Interest expense on borrowings                 € 0 € 22  
Kreos & Claret Financing, Tranche A,B and C | Kreos/Claret Minimal Return Indemnifications                      
Disclosure of detailed information about borrowings [line items]                      
Fair value of other equity instruments                     € 3,620
Kreos & Claret financing                      
Disclosure of detailed information about borrowings [line items]                      
Borrowings, number of tranches | tranche               3      
Borrowings, maximum borrowing capacity per tranche               € 25,000      
Kreos & Claret financing | Kreos A & B BSA                      
Disclosure of detailed information about borrowings [line items]                      
Number of warrants granted (in shares) | shares               214,198      
Kreos & Claret financing | Kreos C BSA                      
Disclosure of detailed information about borrowings [line items]                      
Number of warrants granted (in shares) | shares             405,832        
Kreos & Claret convertible notes (OCABSA) | Ordinary shares                      
Disclosure of detailed information about borrowings [line items]                      
Conversion of convertible instruments (in shares) | shares     392,695   785,389            
Conversion of Kreos OCABSA and heights notes     € 8,296   € 16,058            
Kreos A & B & C BSA | Kreos & Claret financing                      
Disclosure of detailed information about borrowings [line items]                      
Number of warrants repurchased (in shares) | shares           94,117          
Kreos A & B & C BSA | Ordinary shares | Kreos & Claret financing                      
Disclosure of detailed information about borrowings [line items]                      
Exercises of share warrants (in shares) | shares       206,662   319,251          
Increase (decrease) through exercise of warrants, equity       € 14,198   € 19,570          
Kreos/Claret Financing B And C                      
Disclosure of detailed information about borrowings [line items]                      
Repayments of borrowings, classified as financing activities € 33,823 € 33,823                  
Borrowings   29,903                  
Borrowings, Deposit   € 1,081                  
Borrowings, Discount Rate   4.00%                  
Interest expense on borrowings   € 2,001                  
Borrowings, Exit Fee Amount   € 3,000