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Share-based payments - Disclosure of reconciliation of BSAs (Details) - shares
 1 Months Ended 12 Months Ended 110 Months Ended
Apr. 22, 2025
Jan. 13, 2025
Apr. 04, 2024
Jan. 22, 2018
Sep. 18, 2017
Dec. 04, 2015
Apr. 30, 2025
Jan. 31, 2025
Mar. 31, 2024
Dec. 31, 2025
Dec. 31, 2025
Total BSAs                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of instruments outstanding, beginning balance (in shares)               223,944   223,944  
Number of instruments issued (in shares)             39,370 125,000   164,370 486,714
Number of instruments lapsed (in shares)                   0  
Number of instruments exercised (in shares)                   (134,587)  
Number of instruments outstanding, ending balance (in shares)                   253,727 253,727
Number of instruments exercisable (in shares)                   30,989 30,989
Maximum number of shares to be issued if all conditions are met (in shares)                   253,727 253,727
BSA-2015-11                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of instruments outstanding, beginning balance (in shares)               96,924   96,924  
Number of instruments issued (in shares)           96,924       0  
Number of instruments lapsed (in shares)                   0  
Number of instruments exercised (in shares)                   (96,924)  
Number of instruments outstanding, ending balance (in shares)                   0 0
Number of instruments exercisable (in shares)                   0 0
Maximum number of shares to be issued if all conditions are met (in shares)                   0 0
BSA-2015-12                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of instruments outstanding, beginning balance (in shares)               16,400   16,400  
Number of instruments issued (in shares)           82,000       0  
Number of instruments lapsed (in shares)                   0  
Number of instruments exercised (in shares)                   (16,400)  
Number of instruments outstanding, ending balance (in shares)                   0 0
Number of instruments exercisable (in shares)                   0 0
Maximum number of shares to be issued if all conditions are met (in shares)                   0 0
BSA-2017-1                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of instruments outstanding, beginning balance (in shares)               16,400   16,400  
Number of instruments issued (in shares)         16,400         0  
Number of instruments lapsed (in shares)                   0  
Number of instruments exercised (in shares)                   (16,400)  
Number of instruments outstanding, ending balance (in shares)                   0 0
Number of instruments exercisable (in shares)                   0 0
Maximum number of shares to be issued if all conditions are met (in shares)                   0 0
BSA-2018-1                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of instruments outstanding, beginning balance (in shares)               16,400   16,400  
Number of instruments issued (in shares)       49,200           0  
Number of instruments lapsed (in shares)                   0  
Number of instruments exercised (in shares)                   0  
Number of instruments outstanding, ending balance (in shares)                   16,400 16,400
Number of instruments exercisable (in shares)                   16,400 16,400
Maximum number of shares to be issued if all conditions are met (in shares)                   16,400 16,400
BSA-2024-1                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of instruments outstanding, beginning balance (in shares)               58,365   58,365  
Number of instruments issued (in shares)     58,365           77,820 0  
Number of instruments lapsed (in shares)                   0  
Number of instruments exercised (in shares)                   (4,863)  
Number of instruments outstanding, ending balance (in shares)                   53,502 53,502
Number of instruments exercisable (in shares)                   9,726 9,726
Maximum number of shares to be issued if all conditions are met (in shares)                   53,502 53,502
BSA-2024-2                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of instruments outstanding, beginning balance (in shares)               19,455   19,455  
Number of instruments issued (in shares)     19,455             0  
Number of instruments lapsed (in shares)                   0  
Number of instruments exercised (in shares)                   0  
Number of instruments outstanding, ending balance (in shares)                   19,455 19,455
Number of instruments exercisable (in shares)                   4,863 4,863
Maximum number of shares to be issued if all conditions are met (in shares)                   19,455 19,455
BSA-2025-1                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of instruments outstanding, beginning balance (in shares)               0   0  
Number of instruments issued (in shares)   100,000               100,000  
Number of instruments lapsed (in shares)                   0  
Number of instruments exercised (in shares)                   0  
Number of instruments outstanding, ending balance (in shares)                   100,000 100,000
Number of instruments exercisable (in shares)                   0 0
Maximum number of shares to be issued if all conditions are met (in shares)                   100,000 100,000
BSA-2025-2                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of instruments outstanding, beginning balance (in shares)               0   0  
Number of instruments issued (in shares)   25,000               25,000  
Number of instruments lapsed (in shares)                   0  
Number of instruments exercised (in shares)                   0  
Number of instruments outstanding, ending balance (in shares)                   25,000 25,000
Number of instruments exercisable (in shares)                   0 0
Maximum number of shares to be issued if all conditions are met (in shares)                   25,000 25,000
BSA-2025-3                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of instruments outstanding, beginning balance (in shares)               0   0  
Number of instruments issued (in shares) 39,370           39,370     39,370  
Number of instruments lapsed (in shares)                   0  
Number of instruments exercised (in shares)                   0  
Number of instruments outstanding, ending balance (in shares)                   39,370 39,370
Number of instruments exercisable (in shares)                   0 0
Maximum number of shares to be issued if all conditions are met (in shares)                   39,370 39,370