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SUPPLEMENTAL DISCLOSURE WITH RESPECT TO CASH FLOWS - Disclosure of Changes in non-cash working capital (Details) - CAD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure Of Cash Flow Statement Explanatory [Abstract]    
Accounts receivable $ 1,139 $ 1,280
Prepaid expenses (277) 13
Accounts payable and accrued liabilities (4,403) 4,981
Advances from joint venture partners 460 (193)
Changes in non-cash working capital items $ 3,081 $ (6,081)