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Financial instruments by category (Schedule of Credit Quality of Financial Assets) (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Disclosure of Financial instruments by category [Line Items] |  |
Financial assets | $ 223,231 | $ 190,688
Trade receivables [member] |  |
Disclosure of Financial instruments by category [Line Items] |  |
Financial assets | 71,794 | 70,531
External Credit Grade Aa2 [Member] | Financial assets neither past due nor impaired [member] | Trade receivables [member] |  |
Disclosure of Financial instruments by category [Line Items] |  |
Financial assets | 0 | 7,132
External Credit Grade Aa3 [Member] | Financial assets neither past due nor impaired [member] | Trade receivables [member] |  |
Disclosure of Financial instruments by category [Line Items] |  |
Financial assets | 2,013 | 0
External credit rating A3 [Member] | Financial assets neither past due nor impaired [member] | Trade receivables [member] |  |
Disclosure of Financial instruments by category [Line Items] |  |
Financial assets | 1,557 | 0
External Credit Grade Baa1 [Member] | Financial assets neither past due nor impaired [member] | Trade receivables [member] |  |
Disclosure of Financial instruments by category [Line Items] |  |
Financial assets | 99 | 0
External Credit Grade Baa3 [Member] | Financial assets neither past due nor impaired [member] | Trade receivables [member] |  |
Disclosure of Financial instruments by category [Line Items] |  |
Financial assets | 198 | 24,163
External credit grade Ba1 | Financial assets neither past due nor impaired [member] | Trade receivables [member] |  |
Disclosure of Financial instruments by category [Line Items] |  |
Financial assets | 23,755 | 4,984
External credit grade Ba3 [Member] | Financial assets neither past due nor impaired [member] | Trade receivables [member] |  |
Disclosure of Financial instruments by category [Line Items] |  |
Financial assets | 2,745 | 0
External Credit Grade B2 [Member] | Financial assets neither past due nor impaired [member] | Trade receivables [member] |  |
Disclosure of Financial instruments by category [Line Items] |  |
Financial assets | 4,085 | 70
Without an External Credit Rating, Group1 [Member] | Financial assets neither past due nor impaired [member] | Trade receivables [member] |  |
Disclosure of Financial instruments by category [Line Items] |  |
Financial assets | $ 37,342 | $ 34,182

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- Definition The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35H -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35H&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35M -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35M&doctype=Standard -URIDate 2022-03-24 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35N -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35N&doctype=Standard -URIDate 2022-03-24 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35I -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35I&doctype=Standard -URIDate 2022-03-24 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_25&doctype=Standard -URIDate 2022-03-24 + Details
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