Earnings per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Earnings per share
Profit for the year net of tax attributable to ordinary equity holders of the parent for basic earnings	$ 16,625	$ 14,714	$ 30,891	$ 9,311
Weighted average number of ordinary shares for basic earnings per share	18,131,797	18,113,102	18,124,482	18,295,642
Weighted average number of ordinary shares for diluted earnings per share	18,519,769	18,270,461	18,420,761	18,453,001
Earnings per share:
Earnings attributable to ordinary equity holders of the parent, US$ - basic	$ 0.92	$ 0.81	$ 1.7	$ 0.51
Earnings attributable to ordinary equity holders of the parent, US$ - diluted	$ 0.9	$ 0.81	$ 1.68	$ 0.5
Number of deferred exchange shares	2,000,000		2,000,000

Number of deferred exchange shares issued.

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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

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- Definition

The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

+ References

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- Definition

The profit (loss) attributable to ordinary equity holders of the parent entity. [Refer: Profit (loss)]

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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.

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