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Share-based payments - Disclosure of reconciliation of BCEs (Details) - shares |  |  |  |  |  | 12 Months Ended | 110 Months Ended
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May 14, 2018 | Mar. 15, 2018 | Nov. 20, 2017 | Jan. 23, 2017 | Nov. 07, 2016 | Dec. 31, 2025 | Dec. 31, 2025
Total BCEs |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |
Number of instruments outstanding, beginning balance (in shares) |  |  |  |  |  | 330,179 |
Number of instruments issued (in shares) |  |  |  |  |  | 0 | 496,965
Number of instruments lapsed (in shares) |  |  |  |  |  | 0 |
Number of instruments exercised (in shares) |  |  |  |  |  | (122,500) |
Number of instruments outstanding, ending balance (in shares) |  |  |  |  |  | 207,679 | 207,679
Number of instruments exercisable (in shares) |  |  |  |  |  | 157,148 | 157,148
Maximum number of shares to be issued if all conditions are met (in shares) |  |  |  |  |  | 207,679 | 207,679
BCE-2016-1 |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |
Number of instruments outstanding, beginning balance (in shares) |  |  |  |  |  | 18,796 |
Number of instruments issued (in shares) |  |  |  |  | 84,000 | 0 |
Number of instruments lapsed (in shares) |  |  |  |  |  | 0 |
Number of instruments exercised (in shares) |  |  |  |  |  | (18,796) |
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
BCE-2017-1 |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |
Number of instruments outstanding, beginning balance (in shares) |  |  |  |  |  | 67,000 |
Number of instruments issued (in shares) |  |  |  | 67,374 |  | 0 |
Number of instruments lapsed (in shares) |  |  |  |  |  | 0 |
Number of instruments exercised (in shares) |  |  |  |  |  | (33,313) |
Number of instruments outstanding, ending balance (in shares) |  |  |  |  |  | 33,687 | 33,687
Number of instruments exercisable (in shares) |  |  |  |  |  | 33,687 | 33,687
Maximum number of shares to be issued if all conditions are met (in shares) |  |  |  |  |  | 33,687 | 33,687
BCE-2017-2 |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |
Number of instruments outstanding, beginning balance (in shares) |  |  |  |  |  | 112,500 |
Number of instruments issued (in shares) |  |  | 150,000 |  |  | 0 |
Number of instruments lapsed (in shares) |  |  |  |  |  | 0 |
Number of instruments exercised (in shares) |  |  |  |  |  | 0 |
Number of instruments outstanding, ending balance (in shares) |  |  |  |  |  | 112,500 | 112,500
Number of instruments exercisable (in shares) |  |  |  |  |  | 112,500 | 112,500
Maximum number of shares to be issued if all conditions are met (in shares) |  |  |  |  |  | 112,500 | 112,500
BCE-2017-4 |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |
Number of instruments outstanding, beginning balance (in shares) |  |  |  |  |  | 67,373 |
Number of instruments issued (in shares) |  |  | 67,374 |  |  | 0 |
Number of instruments lapsed (in shares) |  |  |  |  |  | 0 |
Number of instruments exercised (in shares) |  |  |  |  |  | (33,686) |
Number of instruments outstanding, ending balance (in shares) |  |  |  |  |  | 33,687 | 33,687
Number of instruments exercisable (in shares) |  |  |  |  |  | 0 | 0
Maximum number of shares to be issued if all conditions are met (in shares) |  |  |  |  |  | 33,687 | 33,687
BCE-2017-5 |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |
Number of instruments outstanding, beginning balance (in shares) |  |  |  |  |  | 33,687 |
Number of instruments issued (in shares) |  |  | 67,374 |  |  | 0 |
Number of instruments lapsed (in shares) |  |  |  |  |  | 0 |
Number of instruments exercised (in shares) |  |  |  |  |  | (16,843) |
Number of instruments outstanding, ending balance (in shares) |  |  |  |  |  | 16,844 | 16,844
Number of instruments exercisable (in shares) |  |  |  |  |  | 0 | 0
Maximum number of shares to be issued if all conditions are met (in shares) |  |  |  |  |  | 16,844 | 16,844
BCE-2018-1 |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |
Number of instruments outstanding, beginning balance (in shares) |  |  |  |  |  | 11,980 |
Number of instruments issued (in shares) |  | 22,000 |  |  |  | 0 |
Number of instruments lapsed (in shares) |  |  |  |  |  | 0 |
Number of instruments exercised (in shares) |  |  |  |  |  | (9,440) |
Number of instruments outstanding, ending balance (in shares) |  |  |  |  |  | 2,540 | 2,540
Number of instruments exercisable (in shares) |  |  |  |  |  | 2,540 | 2,540
Maximum number of shares to be issued if all conditions are met (in shares) |  |  |  |  |  | 2,540 | 2,540
BCE-2018-4 |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |
Number of instruments outstanding, beginning balance (in shares) |  |  |  |  |  | 16,843 |
Number of instruments issued (in shares) | 16,843 |  |  |  |  | 0 |
Number of instruments lapsed (in shares) |  |  |  |  |  | 0 |
Number of instruments exercised (in shares) |  |  |  |  |  | (8,422) |
Number of instruments outstanding, ending balance (in shares) |  |  |  |  |  | 8,421 | 8,421
Number of instruments exercisable (in shares) |  |  |  |  |  | 8,421 | 8,421
Maximum number of shares to be issued if all conditions are met (in shares) |  |  |  |  |  | 8,421 | 8,421
BCE-2018-5 |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |
Number of instruments outstanding, beginning balance (in shares) |  |  |  |  |  | 2,000 |
Number of instruments issued (in shares) | 22,000 |  |  |  |  | 0 |
Number of instruments lapsed (in shares) |  |  |  |  |  | 0 |
Number of instruments exercised (in shares) |  |  |  |  |  | (2,000) |
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

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- Definition Maximum Number Of Other Equity Instruments To Be Issued In Share-Based Payment Arrangement If All Conditions Are Met + References No definition available. + Details
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- Definition The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2025-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2025-en-r&anchor=para_45&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2025-01-01 -Paragraph 47 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2025-en-r&anchor=para_47_b&doctype=Standard -URIDate 2025-03-27 + Details
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