Equity method investment - Gain on recognition of the UKMP assets upon transfer to the Ambler Metals LLC joint venture (Details) - USD ($) $ in Thousands	Feb. 28, 2021	Nov. 30, 2020	Feb. 11, 2020
Less: carrying value of contributed /eliminated assets
Property, plant and equipment	$ 189
Ambler Metals LLC
Table summarizes the gain on recognition of the UKMP assets upon transfer to the Ambler Metals joint venture
Fair value ascribed to Ambler Metals LLC interest		$ 173,145	$ 176,000
Less: carrying value of contributed /eliminated assets
Mineral properties			(30,631)
Property, plant and equipment			(618)
Elimination of Fairbanks warehouse right of use asset			(93)
Elimination of prepaid State of Alaska mining claim fees			(303)
Add:
Reimbursement of claims staking			44
Demobilization costs of drills			278
Cancellation of Fairbanks warehouse lease liability			93
Fair value of mineral properties purchase option			31,000
Gain on derecognition			$ 175,770