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Investment in Ambler Metals LLC - UKMP assets upon transfer to the Ambler Metals joint venture (Details) - USD ($) $ in Thousands | Nov. 30, 2020 | Feb. 11, 2020
--- | --- | ---
Alaska, USA |  |
Less: carrying value of contributed /eliminated assets |  |
Mineral properties | $ (30,631) |
Ambler Metals |  |
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 located in Alaska |  | (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

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