Mineral Properties and development costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2021	Nov. 30, 2020
Mineral properties and development costs, Ending Balance	$ 119
Alaska, USA
Assets derecognized note 4(a)		$ (30,631)
Acquisition costs	119
Mineral properties and development costs, Ending Balance	119
Ambler | Alaska, USA
Assets derecognized note 4(a)		(26,631)
Bornite | Alaska, USA
Assets derecognized note 4(a)		$ (4,000)
West Kobuk | Alaska, USA
Acquisition costs	58
Mineral properties and development costs, Ending Balance	58
East Ambler | Alaska, USA
Acquisition costs	61
Mineral properties and development costs, Ending Balance	$ 61