Investment in Ambler Metals LLC - Financial information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2024	Aug. 31, 2023	Aug. 31, 2024	Aug. 31, 2023	Nov. 30, 2023
The carrying value of equity method investment
Share of loss on equity investment	$ (624)	$ (2,910)	$ (2,019)	$ (5,998)
Investment in Ambler Metals	108,114		108,114		$ 135,021
Assets [Abstract]
Total assets	134,376		134,376		138,020
Cash and cash equivalents	25,738		25,738		2,590
Liabilities [Abstract]
Total liabilities	(553)		(553)		(465)
Operating Income (Loss) [Abstract]
General and administrative	293	278	1,027	1,014
Professional Fees	138	139	530	897
Foreign exchange loss	2	3	3	1
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Assets [Abstract]
Total assets	41,888		41,888		97,180
Cash and cash equivalents	9,848		9,848		63,829
Mineral properties	30,899		30,899		30,899
Liabilities [Abstract]
Total liabilities	(1,455)		(1,455)		(2,931)
Accounts payable and accrued liabilities	(1,209)		(1,209)		(2,500)
Members' equity (total assets less total liabilities)	40,433		40,433		94,249
Operating Income (Loss) [Abstract]
Depreciation	38	38	113	113
Corporate salaries and wages	49	478	411	1,417
General and administrative	93	43	343	389
Mineral property expense	1,024	5,210	3,348	10,002
Professional Fees	325	181	755	397
Foreign exchange loss		(6)	2	(3)
Interest and other income	281	125	933	319
Comprehensive loss	1,248	$ 5,819	4,039	$ 11,996
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			(25,000)
Share of loss on equity investment			(2,019)
Investment in Ambler Metals	$ 108,114		$ 108,114