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Related parties (Narrative) (Details) (USD $)
9 Months Ended
Aug. 31, 2013
Nov. 30, 2012
Aug. 31, 2013
NovaGold and Subsidiaries [Member]
Management and Office Services [Member]
Aug. 31, 2013
The Company (NovaCopper) [Member]
Accounts Payable [Member]
Aug. 31, 2013
The Company (NovaCopper) [Member]
Exploration and Managment Services [Member]
Related party transactions, amount of transaction     $ 151,000    
Due from related parties         82,000
Due to related parties $ 0 $ 127,000   $ 127,000