v3.26.1
Share-based payments - Disclosure of Number and Weighted Average Remaining Contractual Life of Founders' Warrants, Warrants, and Free Shares Outstanding (Details)
12 Months Ended
Jun. 27, 2023
shares
Apr. 21, 2021
€ / shares
Apr. 20, 2021
shares
€ / shares
Mar. 17, 2020
shares
€ / shares
Mar. 29, 2019
shares
€ / shares
Jul. 27, 2018
shares
€ / shares
Jan. 07, 2017
shares
€ / shares
Feb. 02, 2016
shares
€ / shares
Jun. 25, 2015
shares
€ / shares
Jun. 10, 2015
shares
€ / shares
Feb. 10, 2015
shares
€ / shares
Sep. 16, 2014
€ / shares
Dec. 31, 2025
shares
Dec. 31, 2025
shares
uSDollarPerEuro
Dec. 31, 2024
shares
Dec. 31, 2025
uSDollarPerEuro
Dec. 31, 2023
shares
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding                                  
Number of awards issued (in shares)                         0        
Number of awards outstanding (in shares)                         4,985,304 4,985,304 4,936,540   4,172,089
BSPCE                                  
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding                                  
Number of awards issued (in shares)                         0   0    
Number of awards outstanding (in shares)                         296,100 296,100 467,067   557,367
Awards exercised during the period (in shares)                         75,867   0    
Forfeited (in shares)                         (95,100)   (90,300)    
BSPCE 2015-1                                  
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding                                  
Number of awards issued (in shares)                     71,650   0   0    
Grant price (in euro per share) | € / shares                     € 0            
Exercise price (in euros per share) | € / shares                     € 18.57            
Number of awards outstanding (in shares)                         0 0 67,750   68,100
Number of awards, exercised (in shares)                         0 0      
Awards exercised during the period (in shares)                         0   0    
Number of awards lapsed or cancelled (in shares)                         71,650 71,650      
Number of awards lapsed or cancelled during the period (in shares)                         67,750        
Forfeited (in shares)                         (67,750)   (350)    
BSPCE 2015-3                                  
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding                                  
Number of awards issued (in shares)                   53,050     0   0    
Grant price (in euro per share) | € / shares                   € 0              
Exercise price (in euros per share) | € / shares                   € 20.28              
Number of awards outstanding (in shares)                         0 0 27,350   28,400
Number of awards, exercised (in shares)                         0 0      
Awards exercised during the period (in shares)                         0   0    
Number of awards lapsed or cancelled (in shares)                         53,050 53,050      
Number of awards lapsed or cancelled during the period (in shares)                         27,350        
Forfeited (in shares)                         (27,350)   (1,050)    
BSPCE 2016 Ordinary                                  
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding                                  
Number of awards issued (in shares)               126,400                  
Grant price (in euro per share) | € / shares               € 0                  
Exercise price (in euros per share) | € / shares               € 14.46                  
Number of awards outstanding (in shares)                         66,850 66,850      
Number of awards, exercised (in shares)                         30,300 30,300      
Awards exercised during the period (in shares)                         29,967        
Number of awards lapsed or cancelled (in shares)                         29,250 29,250      
Number of awards lapsed or cancelled during the period (in shares)                         0        
BSPCE 2016 Performance                                  
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding                                  
Number of awards issued (in shares)               129,250                  
Grant price (in euro per share) | € / shares               € 0                  
Exercise price (in euros per share) | € / shares               € 14.46                  
Number of awards outstanding (in shares)                         55,200 55,200      
Number of awards, exercised (in shares)                         42,900 42,900      
Awards exercised during the period (in shares)                         42,900        
Number of awards lapsed or cancelled (in shares)                         31,150 31,150      
Number of awards lapsed or cancelled during the period (in shares)                         0        
BSPCE 2017 Ordinary                                  
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding                                  
Number of awards issued (in shares)             117,650                    
Grant price (in euro per share) | € / shares             € 0                    
Exercise price (in euros per share) | € / shares             € 15.93                    
Number of awards outstanding (in shares)                         94,050 94,050      
Number of awards, exercised (in shares)                         3,000 3,000      
Awards exercised during the period (in shares)                         3,000        
Number of awards lapsed or cancelled (in shares)                         20,600 20,600      
Number of awards lapsed or cancelled during the period (in shares)                         0        
BSPCE 2017 P                                  
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding                                  
Number of awards issued (in shares)             80,000                    
Grant price (in euro per share) | € / shares             € 0                    
Exercise price (in euros per share) | € / shares             € 15.93                    
Number of awards outstanding (in shares)                         80,000 80,000      
Number of awards, exercised (in shares)                         0 0      
Awards exercised during the period (in shares)                         0        
Number of awards lapsed or cancelled (in shares)                         0 0      
Number of awards lapsed or cancelled during the period (in shares)                         0        
BSA                                  
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding                                  
Number of awards issued (in shares)                         0   0    
Number of awards outstanding (in shares)                         56,251 56,251 141,251   151,251
Awards exercised during the period (in shares)                         0   0    
Forfeited (in shares)                         (85,000)   (10,000)    
BSA 2014                                  
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding                                  
Number of awards issued (in shares)                         0   0    
Exercise price (in euros per share) | € / shares                       € 17.67          
Number of awards outstanding (in shares)                         0 0 0   10,000
Awards exercised during the period (in shares)                         0   0    
Forfeited (in shares)                         0   (10,000)    
BSA 2015-1                                  
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding                                  
Number of awards issued (in shares)                     26,000   0   0    
Grant price (in euro per share) | € / shares                     € 4.87            
Exercise price (in euros per share) | € / shares                     € 17.67            
Number of awards outstanding (in shares)                         0 0 21,000   21,000
Number of awards, exercised (in shares)                         0 0      
Awards exercised during the period (in shares)                         0   0    
Number of awards lapsed or cancelled (in shares)                         26,000 26,000      
Number of awards lapsed or cancelled during the period (in shares)                         21,000        
Forfeited (in shares)                         (21,000)   0    
BSA 2015-2 a                                  
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding                                  
Number of awards issued (in shares)                 64,000       0   0    
Grant price (in euro per share) | € / shares                 € 5.00                
Exercise price (in euros per share) | € / shares                 € 19.54                
Number of awards outstanding (in shares)                         0 0 64,000   64,000
Number of awards, exercised (in shares)                         0 0      
Awards exercised during the period (in shares)                         0   0    
Number of awards lapsed or cancelled (in shares)                         64,000 64,000      
Number of awards lapsed or cancelled during the period (in shares)                         64,000        
Forfeited (in shares)                         (64,000)   0    
BSA 2018-2                                  
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding                                  
Number of awards issued (in shares)           5,820             0   0    
Grant price (in euro per share) | € / shares           € 2.36                      
Exercise price (in euros per share) | € / shares           € 16.10                      
Number of awards outstanding (in shares)                         5,820 5,820 5,820   5,820
Number of awards, exercised (in shares)                         0 0      
Awards exercised during the period (in shares)                         0   0    
Number of awards lapsed or cancelled (in shares)                         0 0      
Number of awards lapsed or cancelled during the period (in shares)                         0        
Forfeited (in shares)                         0   0    
BSA 2019-1                                  
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding                                  
Number of awards issued (in shares)         18,000               0   0    
Grant price (in euro per share) | € / shares         € 1.15                        
Exercise price (in euros per share) | € / shares         € 11.66                        
Number of awards outstanding (in shares)                         18,000 18,000 18,000   18,000
Number of awards, exercised (in shares)                         0 0      
Awards exercised during the period (in shares)                         0   0    
Number of awards lapsed or cancelled (in shares)                         0 0      
Number of awards lapsed or cancelled during the period (in shares)                         0        
Forfeited (in shares)                         0   0    
BSA 2020                                  
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding                                  
Number of awards issued (in shares)       18,000                 0   0    
Grant price (in euro per share) | € / shares       € 0.29                          
Exercise price (in euros per share) | € / shares       € 6.59                          
Number of awards outstanding (in shares)                         18,000 18,000 18,000   18,000
Number of awards, exercised (in shares)                         0 0      
Awards exercised during the period (in shares)                         0   0    
Number of awards lapsed or cancelled (in shares)                         0 0      
Number of awards lapsed or cancelled during the period (in shares)                         0        
Forfeited (in shares)                         0   0    
BSA 2021                                  
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding                                  
Number of awards issued (in shares)     48,103                   0   0    
Grant price (in euro per share) | € / shares     € 2.95                            
Exercise price (in euros per share) | € / shares   € 13.47 € 13.47                            
Number of awards outstanding (in shares)                         14,431 14,431 14,431   14,431
Number of awards, exercised (in shares)                         0 0      
Awards exercised during the period (in shares)                         0   0    
Number of awards lapsed or cancelled (in shares)                         33,672 33,672      
Number of awards lapsed or cancelled during the period (in shares)                         0        
Forfeited (in shares)                         0   0    
AGA                                  
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding                                  
Number of awards issued (in shares)                         0   0    
Number of awards outstanding (in shares)                         0 0 815,920   1,127,296
Awards exercised during the period (in shares)                         809,820   293,523    
Forfeited (in shares)                         (5,700)   (17,853)    
AGA 2022                                  
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding                                  
Number of awards issued (in shares)                         0   0    
Number of awards outstanding (in shares)                         0 0 0   293,776
Awards exercised during the period (in shares)                         0   293,523    
Forfeited (in shares)                         0   (253)    
AGA 2023 - P1                                  
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding                                  
Number of awards issued (in shares) 427,110                       0   0    
Number of awards outstanding (in shares)                         0 0 392,460   400,960
Number of awards, exercised (in shares) | uSDollarPerEuro                               392,060  
Awards exercised during the period (in shares)                         392,060 392,060 0    
Number of awards lapsed or cancelled (in shares)                         35,050 35,050      
Number of awards lapsed or cancelled during the period (in shares)                         400        
Forfeited (in shares)                         0   (8,500)    
AGA 2023 - P2                                  
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding                                  
Number of awards issued (in shares) 439,210                       0   0    
Number of awards outstanding (in shares)                         0 0 423,460 0 432,560
Number of awards, exercised (in shares) | uSDollarPerEuro                               417,760  
Awards exercised during the period (in shares)                         417,760 417,760 0    
Number of awards lapsed or cancelled (in shares) | uSDollarPerEuro                               21,450  
Number of awards lapsed or cancelled during the period (in shares)                         5,700        
Forfeited (in shares)                         (5,700)   (9,100)