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Accounts and Other Receivables (Schedule of Trade and Other Receivables) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Accounts and Other Receivables [abstract] |  |
Trade receivables from concentrate sales | $ 28,132 | $ 34,250
Advances and other receivables | 3,179 | 1,249
Value added taxes recoverable | 1,458 | 871
Total accounts and other receivables | 32,769 | 36,370
Amount of past due | $ 0 | $ 0

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- Definition The amount of current trade receivables and current other receivables. [Refer: Current trade receivables; Other current receivables] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 54 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_h&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 78 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_78_b&doctype=Standard -URIDate 2017-03-09 + Details
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