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Other Expenses (Schedule of Other Expenses) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Other Expenses [abstract] |  |
Write-down of investment in associate | $ 2,706 |
Write off of mineral properties | 1,554 |
Loss (gain) on disposal of assets | 67 | $ 167
Write-off of spare parts |  | 398
Write off of assets held for sale |  | 691
Other expenses | 284 | 705
Other (income) expenses | $ 4,611 | $ 1,961

X
- Definition Impairment loss recognised in profit or loss property plant and equipment of certain properties. + References No definition available. + Details
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X
- Definition The amount other financial (expense) income. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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X
- Definition Other Income and Expense [abstract]. + References No definition available. + Details
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X
- Definition The amount of other (income) expenses. + References No definition available. + Details
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Balance Type: | credit
Period Type: | duration

X
- Definition Write down of investment in associate. + References No definition available. + Details
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Period Type: | duration

X
- Definition The amount of write off assets held for sale. + References No definition available. + Details
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X
- Definition Write-off of spare parts in other expenses. + References No definition available. + Details
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X
- Definition The gains (losses) on disposals of property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 98 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_98_c&doctype=Standard -URIDate 2018-03-16 + Details
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