Investment in Ambler Metals LLC - Financial information (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2023	Nov. 30, 2022	Nov. 30, 2021
The carrying value of equity method investment
Share of loss on equity investment	$ (7,844)	$ (17,360)	$ (13,082)
Investment in Ambler Metals	135,021	142,754
Assets [Abstract]
Total assets	138,020	145,995
Cash	2,590	2,573
Liabilities [Abstract]
Total liabilities	(465)	(567)
Ambler Metals' Net Loss
General and administrative	1,328	1,287	1,517
Professional Fees	1,073	998	818
Foreign exchange (gain) loss	5	(18)	36
Ambler Metals
Assets [Abstract]
Total assets	97,180	114,049
Cash	63,829	80,755
Mineral properties	30,899	30,899
Liabilities [Abstract]
Total liabilities	(2,931)	(4,335)
Accounts payable and accrued liabilities	(2,500)	(3,664)
Members' equity (total assets less total liabilities)	94,249	109,714
Ambler Metals' Net Loss
Depreciation	150	77
Corporate salaries and wages	2,068	2,381
General and administrative	547	991
Mineral property expense	12,822	22,720
Professional Fees	547	1,047
Foreign exchange (gain) loss	(2)	6
Interest and other income	445	1,058
Comprehensive loss	15,687	26,164
Ambler Metals LLC
The carrying value of equity method investment
Investment in Ambler Metals		142,754	$ 160,063
Joint venture, contributed amount	111	51
Share of loss on equity investment	(7,844)	$ (17,360)
Investment in Ambler Metals	$ 135,021