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OPERATING SEGMENTS - Revenue by Product (Details) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Gold |  |
Disclosure of products and services [line items] |  |
Revenue (as a percent) | 80.00% | 65.00%
Silver |  |
Disclosure of products and services [line items] |  |
Revenue (as a percent) | 20.00% | 35.00%
Customer One |  |
Disclosure of products and services [line items] |  |
Revenue (as a percent) | 7.00% | 15.00%

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- Definition The percentage of the entity's revenue. [Refer: Revenue] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 8 -IssueDate 2017-01-01 -Paragraph 34 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2017-03-01&anchor=para_34&doctype=Standard -URIDate 2017-03-09 + Details
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- Details
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- Details
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- Details
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