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OPERATING SEGMENTS - Revenue by Product (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of products and services [line items]
Revenue (as a percent)	100.00%	100.00%
Gold
Disclosure of products and services [line items]
Revenue (as a percent)	88.00%	76.00%
Silver
Disclosure of products and services [line items]
Revenue (as a percent)	10.00%	19.00%
Lead
Disclosure of products and services [line items]
Revenue (as a percent)	1.00%	3.00%
Zinc
Disclosure of products and services [line items]
Revenue (as a percent)	1.00%	2.00%

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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X

- 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 2020-01-01
-Paragraph 34
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2020-en-r&anchor=para_34&doctype=Standard
-URIDate 2020-01-01

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- Details

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- Details

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- Details

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X

- Details

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