Financial instruments - fair values and risk management - Sensitivity analysis (Details) - Currency risk - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2025	Dec. 31, 2024
Sensitivity analysis
Strengthening of US$ by 10%	10.00%	10.00%
Increase (decrease) in equity and profit or loss due to strengthening of USD by 10%	$ (2,116)	$ (1,915)
Increase (decrease) in equity and profit or loss due to weakening of USD by 10%	2,116	1,915
Euro
Sensitivity analysis
Increase (decrease) in equity and profit or loss due to strengthening of USD by 10%	(2,255)	(2,025)
Increase (decrease) in equity and profit or loss due to weakening of USD by 10%	2,255	2,025
Russian Ruble
Sensitivity analysis
Increase (decrease) in equity and profit or loss due to strengthening of USD by 10%	(10)	(7)
Increase (decrease) in equity and profit or loss due to weakening of USD by 10%	10	7
Armenian Dram
Sensitivity analysis
Increase (decrease) in equity and profit or loss due to strengthening of USD by 10%	180	140
Increase (decrease) in equity and profit or loss due to weakening of USD by 10%	(180)	(140)
Kazakhstani Tenge
Sensitivity analysis
Increase (decrease) in equity and profit or loss due to strengthening of USD by 10%	(41)	(45)
Increase (decrease) in equity and profit or loss due to weakening of USD by 10%	41	45
United Arab Emirates dirham
Sensitivity analysis
Increase (decrease) in equity and profit or loss due to strengthening of USD by 10%	1	1
Increase (decrease) in equity and profit or loss due to weakening of USD by 10%	(1)	(1)
British pound sterling
Sensitivity analysis
Increase (decrease) in equity and profit or loss due to strengthening of USD by 10%		3
Increase (decrease) in equity and profit or loss due to weakening of USD by 10%		(3)
Japanese yen
Sensitivity analysis
Increase (decrease) in equity and profit or loss due to strengthening of USD by 10%	9	18
Increase (decrease) in equity and profit or loss due to weakening of USD by 10%	$ (9)	$ (18)

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No definition available.

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- Definition

The amount of increase (decrease) in the fair value measurement of the entity's own equity instruments, recognised in profit or loss after tax, due to a reasonably possible decrease in an unobservable input. [Refer: Tax income (expense)]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 13
-IssueDate 2024-01-01
-Paragraph 93
-Subparagraph h
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2024-en-r&anchor=para_93_h_ii&doctype=Standard
-URIDate 2024-03-27

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The amount of increase (decrease) in the fair value measurement of the entity's own equity instruments, recognised in profit or loss after tax, due to a reasonably possible increase in an unobservable input. [Refer: Tax income (expense)]

+ References

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The percentage of a reasonably possible increase in an unobservable input used in fair value measurement of the entity's own equity instruments.

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