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Note 11 - Related Party Transactions (Details Textual) - Galore Creek [Member] - USD ($)
$ in Thousands
6 Months Ended
May 31, 2017
May 31, 2016
Nov. 30, 2016
Rental Income, Nonoperating $ 169 $ 165  
Accounts Receivable, Related Parties, Current 28   $ 28
Accounts Receivable, Related Parties, Noncurrent $ 3,508   $ 3,526