Investment in Ambler Metals LLC - Gain on recognition of the UKMP assets upon transfer to the Ambler Metals LLC joint venture (Details) - USD ($) $ in Thousands	Nov. 30, 2020	Feb. 11, 2020
Less: carrying value of contributed /eliminated assets
Property, plant and equipment	$ (618)
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		$ 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