v3.26.1
Share capital - Warrant Plans (Details)
12 Months Ended
Jun. 21, 2021
€ / shares
Jun. 25, 2015
shares
€ / shares
Feb. 10, 2015
shares
€ / shares
Dec. 31, 2025
shares
€ / shares
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Number of shares issued (in shares)       0
Par value per share (euro per share) | € / shares       € 0.03
BSA 2013 | Supervisory Board        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Number of shares issued (in shares)   64,000 21,000  
Par value per share (euro per share) | € / shares     € 0.03  
Exercise price (in euros per share) | € / shares   € 19.54 € 17.67  
Number of awards lapsed or cancelled during the period (in shares)       21,000
Number of awards lapsed or cancelled during the period (in shares)   64,000    
OSA 2022-06 O        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Exercise price (in euros per share) | € / shares € 4.16      
Number of awards lapsed or cancelled during the period (in shares)       0