Earnings per share - Reconciliation of Weighted Average Number Of ordinary Shares For Basic And Diluted Earnings Per Share (Details) - shares	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Earnings per share
Weighted average number of ordinary shares for basic earnings per share	18,150,489	18,131,797	18,150,489	18,124,482
Weighted average number of ordinary shares for diluted earnings per share	18,471,952	18,519,769	18,508,238	18,420,761

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 33
-IssueDate 2025-01-01
-Paragraph 70
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2025-en-r&anchor=para_70_b&doctype=Standard
-URIDate 2025-03-27

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Period Type:	duration