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FINANCIAL INSTRUMENTS - Concentration of credit risk (Details) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of detailed information about financial instruments [line items] |  |  |
Percentage of entity's revenue | 86.30% |  |
Concentration risk, percentage | 26.10% | 32.00% | 28.90%
United States of America |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Percentage of entity's revenue | 73.30% |  |
One Customer |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Percentage of entity's revenue | 11.20% | 11.30% | 10.20%

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- Definition Concentration Risk, Percentage + References No definition available. + Details
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- 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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- 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 2019-01-01 -Paragraph 34 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2019-en-r&anchor=para_34&doctype=Standard -URIDate 2019-03-27 + Details
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- Details
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- Details
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