Investment in Ambler Metals LLC - Financial information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2024	May 31, 2023	Jun. 10, 2024	Nov. 30, 2023
The carrying value of equity method investment
Return of capital			$ 12,500
Share of loss on equity investment	$ (602)	$ (1,603)	(1,395)	$ (3,088)
Investment in Ambler Metals	121,238		121,238			$ 135,021
Assets [Abstract]
Total assets	135,338		135,338			138,020
Cash and cash equivalents	14,022		14,022			2,590
Liabilities [Abstract]
Total liabilities	(463)		(463)			(465)
Operating Income (Loss) [Abstract]
General and administrative	319	328	734	736
Professional Fees	192	188	392	758
Foreign exchange loss	(1)	2	1	(2)
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Assets [Abstract]
Total assets	67,557		67,557			97,180
Cash and cash equivalents	35,139		35,139			63,829
Mineral properties	30,899		30,899			30,899
Liabilities [Abstract]
Total liabilities	(875)		(875)			(2,931)
Accounts payable and accrued liabilities	(571)		(571)			(2,500)
Members' equity (total assets less total liabilities)	66,682		66,682			94,249
Operating Income (Loss) [Abstract]
Depreciation	37	38	75	75
Corporate salaries and wages	128	495	362	939
General and administrative	121	213	248	346
Mineral property expense	1,230	2,507	2,324	4,792
Professional Fees	253	57	430	216
Foreign exchange loss		3	2	3
Interest and other income	565	105	652	194
Comprehensive loss	1,204	$ 3,208	2,789	$ 6,177
Ambler Metals LLC
The carrying value of equity method investment
Investment in Ambler Metals						$ 135,021
Joint venture, contributed amount	112		112
Return of capital			(12,500)
Share of loss on equity investment			(1,395)
Investment in Ambler Metals	$ 121,238		$ 121,238
Assets [Abstract]
Cash and cash equivalents					$ 12,500