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Sale of Sunward Investments Ltd (Narrative) (Details)
CAD / shares in Units, $ / shares in Units, $ in Thousands
12 Months Ended
Sep. 01, 2016
USD ($)
shares
Sep. 01, 2016
CAD
shares
Nov. 30, 2017
CAD
shares
Nov. 30, 2017
$ / shares
Nov. 30, 2017
CAD / shares
Jun. 19, 2015
Noncash or Part Noncash Acquisition, Investments Acquired Shares | shares 5,000,000 5,000,000 5,000,000      
Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Warrants Issued | shares 1,000,000 1,000,000 1,000,000      
Noncash or Part Noncash Divestiture, Amount of Consideration Received $ 8,102          
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned 7,800          
Share Price | (per share)       $ 1.56 CAD 2.04  
Sunward Investments [Member]            
Class of Warrant or Right, Grants in Period, Exercise Price | CAD   CAD 3.50 CAD 3.50      
Mineral property acquisition       100.00% 100.00% 100.00%
Noncash or Part Noncash Divestiture, Amount of Consideration Received 8,100          
Noncash or Part Noncash Acquisition Noncash Financial or Equity Instrument Consideration Warrants Value $ 300