Post-employment benefits - Summary of Pension Remeasurement Recognized in Statement Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure Of Defined Benefit Plans [Line Items]
Changes in demographic assumptions	$ 700	$ 223	$ 1,278
Changes in financial assumptions	(903)	2,323	50
Experience adjustments	606	(186)	(831)
Total actuarial gains (losses)	403	2,360	497
Return on plan assets	(654)	(204)	(32)
Currency translation differences	39	(2)	(4)
Total recognized	(212)	2,154	461
Funded
Disclosure Of Defined Benefit Plans [Line Items]
Changes in demographic assumptions	700	0	1,278
Changes in financial assumptions	(901)	2,311	37
Experience adjustments	602	(201)	(844)
Total actuarial gains (losses)	401	2,110	471
Return on plan assets	(654)	(204)	(32)
Currency translation differences	37	(4)	(4)
Total recognized	(216)	1,902	435
Unfunded
Disclosure Of Defined Benefit Plans [Line Items]
Changes in demographic assumptions	0	223	0
Changes in financial assumptions	(2)	12	13
Experience adjustments	4	15	13
Total actuarial gains (losses)	2	250	26
Return on plan assets	0	0	0
Currency translation differences	2	2	0
Total recognized	$ 4	$ 252	$ 26

The amount of other comprehensive income, net of tax, resulting from actuarial gains (losses) arising from changes in demographic assumptions that result in remeasurements of the net defined benefit liability (asset). Demographic assumptions deal with matters such as: (a) mortality; (b) rates of employee turnover, disability and early retirement; (c) the proportion of plan members with dependants who will be eligible for benefits; (d) the proportion of plan members who will select each form of payment option available under the plan terms; and (e) claim rates under medical plans. [Refer: Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans] [Contrast: Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions]

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- Definition

The amount of other comprehensive income, net of tax, resulting from actuarial gains (losses) arising from changes in financial assumptions that result in remeasurements of the net defined benefit liability (asset). Financial assumptions deal with items such as: (a) the discount rate; (b) benefit levels, excluding any cost of the benefits to be met by employees, and future salary; (c) in the case of medical benefits, future medical costs, including claim handling costs (ie the costs that will be incurred in processing and resolving claims, including legal and adjuster's fees); and (d) taxes payable by the plan on contributions relating to service before the reporting date or on benefits resulting from that service. [Refer: Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans] [Contrast: Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions]

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- Definition

The amount of other comprehensive income, net of tax, resulting from actuarial gains (losses) arising from experience adjustments that result in remeasurements of the net defined benefit liability (asset). Experience adjustments deal with the effects of differences between the previous actuarial assumptions and what has actually occurred. [Refer: Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans] [Contrast: Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from experience adjustments]

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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No definition available.

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- Definition

The amount of other comprehensive income, net of tax, related to gains (losses) on remeasurements of defined benefit plans, which comprise actuarial gains and losses; the return on plan assets, excluding amounts included in net interest on the net defined benefit liability (asset); and any change in the effect of the asset ceiling, excluding amounts included in net interest on the net defined benefit liability (asset). [Refer: Other comprehensive income; Defined benefit plans [member]; Plan assets [member]; Net defined benefit liability (asset)] [Contrast: Decrease (increase) in net defined benefit liability (asset) resulting from gain (loss) on remeasurement in other comprehensive income]

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The decrease (increase) in the net defined benefit liability (asset) resulting from the return on plan assets, excluding amounts included in interest income or expense. The return on plan assets is interest, dividends and other revenue derived from the plan assets, together with realised and unrealised gains or losses on the plan assets, less any costs of managing plan assets and less any tax payable by the plan itself, other than tax included in the actuarial assumptions used to measure the present value of the defined benefit obligation. [Refer: Plan assets [member]; Net defined benefit liability (asset); Actuarial assumptions [member]; Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income)]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Actuarial gains (losses), net defined benefit plans.

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No definition available.

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Pension remeasurement currency translation differences.

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No definition available.

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