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Taxation - Disclosure of unrecognized tax losses and tax credits carryforwards (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Gross Amount |  |
Tax losses and tax credits carryforwards [Line Items] |  |
Tax losses expiring | $ 219,466 | $ 215,425
Tax credits expiring | 11,101 | 9,636
Gross Amount | Within 10 years |  |
Tax losses and tax credits carryforwards [Line Items] |  |
Tax losses expiring | 23,930 | 19,735
Tax credits expiring | 43 | 4
Gross Amount | More than 10 years |  |
Tax losses and tax credits carryforwards [Line Items] |  |
Tax losses expiring | 42,822 | 47,937
Tax credits expiring | 11,058 | 9,632
Gross Amount | Available indefinitely |  |
Tax losses and tax credits carryforwards [Line Items] |  |
Tax losses expiring | 152,714 | 147,753
Tax credits expiring | 0 | 0
Tax Effected |  |
Tax losses and tax credits carryforwards [Line Items] |  |
Tax losses expiring | 48,317 | 46,982
Tax credits expiring | 11,101 | 9,636
Tax Effected | Within 10 years |  |
Tax losses and tax credits carryforwards [Line Items] |  |
Tax losses expiring | 5,387 | 4,343
Tax credits expiring | 43 | 4
Tax Effected | More than 10 years |  |
Tax losses and tax credits carryforwards [Line Items] |  |
Tax losses expiring | 10,509 | 11,611
Tax credits expiring | 11,058 | 9,632
Tax Effected | Available indefinitely |  |
Tax losses and tax credits carryforwards [Line Items] |  |
Tax losses expiring | 32,421 | 31,028
Tax credits expiring | $ 0 | $ 0

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- Definition The amount of unused tax losses for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2022-03-24 -Paragraph 81 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81_e&doctype=Standard -URIDate 2022-03-24 + Details
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