Investment in Ambler Metals LLC - Financial information (Details) - USD ($) $ in Thousands	3 Months Ended
	Feb. 28, 2023	Feb. 28, 2022	Nov. 30, 2022	Feb. 11, 2020
The carrying value of equity method investment
Joint venture, contributed amount	$ 111
Share of loss on equity investment	(1,485)	$ (1,910)
Investment in Ambler Metals	141,380		$ 142,754
Assets [Abstract]
Total assets	143,537		145,995
Cash	1,682		2,573
Liabilities [Abstract]
Total liabilities	(846)		(567)
Ambler Metals' Net Loss
General and administrative	408	397
Professional Fees	570	245
Foreign exchange (gain)/loss	(4)	3
Ambler Metals
Assets [Abstract]
Total assets	109,541		114,049
Cash	76,476		80,755
Mineral properties	30,899		30,899
Liabilities [Abstract]
Total liabilities	(2,574)		(4,335)
Accounts payable and accrued liabilities	(1,962)		(3,664)
Members' equity (total assets less total liabilities)	106,967		109,714
Ambler Metals' Net Loss
Depreciation	37	23
Corporate salaries and wages	444	474
General and administrative	133	232
Mineral property expense	2,285	3,040
Professional Fees	159	297
Foreign exchange (gain)/loss		2
Interest income	(89)	(248)
Comprehensive loss	2,969	$ 3,820
Ambler Metals LLC
The carrying value of equity method investment
Investment in Ambler Metals			$ 142,754
Joint venture, contributed amount	111
Share of loss on equity investment	(1,485)
Investment in Ambler Metals	$ 141,380			$ 176,000