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Identification and business activity - Net cash flows of discontinued operations (Details) - Mining activities [Member] - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Identification and business activity |  |  |
Operating activities | $ 0 | $ (2) | $ 1,800
Investing activities | 0 | 0 | (1,817)
Decrease in cash and cash equivalents for the year | $ 0 | $ (2) | $ (17)

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- Definition Identification and business activity + References No definition available. + Details
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- Definition The cash flows from (used in) the entity's investing activities, related to discontinued operations. [Refer: Discontinued operations [member]; Cash flows from (used in) investing activities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 5 -IssueDate 2020-01-01 -Paragraph 33 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=5&code=ifrs-tx-2020-en-r&anchor=para_33_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The cash flows from (used in) the entity's operating activities, related to discontinued operations. [Refer: Discontinued operations [member]; Cash flows from (used in) operating activities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 5 -IssueDate 2020-01-01 -Paragraph 33 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=5&code=ifrs-tx-2020-en-r&anchor=para_33_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The increase (decrease) in cash and cash equivalents from discontinued operations. [Refer: Cash and cash equivalents; Discontinued operations [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 5 -IssueDate 2020-01-01 -Paragraph 33 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=5&code=ifrs-tx-2020-en-r&anchor=para_33_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Details
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