Note 16 - Related Party Transactions (Details Textual) - Donlin Gold [Member] - USD ($) $ in Thousands	12 Months Ended
Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2018
Accounts Receivable, Related Parties	$ 6	$ 0
Technical Services Provided [Member]
Related Party Transaction, Amounts of Transaction	$ 0	$ 0	$ 658

For an unclassified balance sheet, amount of receivables arising from transactions with related parties.

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Name:	us-gaap_AccountsReceivableRelatedParties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant