Earnings per share - Reconciliation of Weighted Average Number Of ordinary Shares For Basic And Diluted Earnings Per Share (Details) - shares	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Earnings per share
Weighted average number of ordinary shares for basic earnings per share	18,130,912	18,204,262	19,739,686
Effect of share options to be issued	267,408	232,703	203,642
Effect of issue of ordinary shares related to Cubic Games Studio Ltd put option			87,897
Weighted average number of ordinary shares for diluted earnings per share	18,398,320	18,436,965	20,031,225

The potential dilutive effect on the weighted average number of ordinary shares that relate to the assumed exercise of the entity's put option related to Cubic Games Ltd.

No definition available.

+ Details

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- Definition

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]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 33
-IssueDate 2025-01-01
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-URIDate 2025-03-27

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- Definition

The potential dilutive effect on the weighted average number of ordinary shares that relate to the assumed exercise of the entity's share options.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 33
-IssueDate 2025-01-01
-Paragraph 70
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-URIDate 2025-03-27

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- References

No definition available.

+ Details

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- Definition

The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

+ References

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