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CAPITAL STOCK - Schedule of Stockholders' Equity Note, Warrants or Rights (Details) - Share Purchase Warrants Denominated in United States Dollars
$ / shares in Units, $ in Thousands
9 Months Ended
Sep. 30, 2017
USD ($)
$ / shares
shares
Class of Warrant or Right [Line Items]  
Fair value of warrants $ 2,725
March 14, 2019  
Class of Warrant or Right [Line Items]  
Exercise price of warrants (in dollars per share) | $ / shares $ 3.20
Number of warrants outstanding (in shares) | shares 2,515,625
Fair value of warrants $ 320
September 20, 2021  
Class of Warrant or Right [Line Items]  
Exercise price of warrants (in dollars per share) | $ / shares $ 2.45
Number of warrants outstanding (in shares) | shares 4,168,750
Fair value of warrants $ 2,405