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Note 12 - Related Party Transactions (Details Textual) - Donlin Gold [Member] - USD ($)
$ in Thousands
9 Months Ended
Aug. 31, 2019
Aug. 31, 2018
Nov. 30, 2018
Accounts Receivable, Related Parties $ 44   $ 247
Technical Services Provided [Member]      
Related Party Transaction, Amounts of Transaction $ 0 $ 181