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Note 11 - Related Party Transactions (Details Textual) - Galore Creek [Member] - USD ($)
$ in Thousands
9 Months Ended
Aug. 31, 2017
Aug. 31, 2016
Nov. 30, 2016
Rental Income, Nonoperating $ 204 $ 251  
Accounts Receivable, Related Parties, Current     $ 28
Accounts Receivable, Related Parties, Noncurrent   $ 3,777 $ 3,526