SUPPLEMENTAL CASH FLOW INFORMATION - Narrative (Details) - USD ($)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Statement of cash flows [abstract]
Income taxes paid (refund)	$ 0	$ 0
Debt repayments of interest	$ 7,900,000	$ 7,300,000

The cash outflow for interest paid, classified as financing activities.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 7
-IssueDate 2018-01-01
-Paragraph 31
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2018-03-01&anchor=para_31&doctype=Standard
-URIDate 2018-03-16

Name:	ifrs-full_InterestPaidClassifiedAsFinancingActivities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration