Investment in Ambler Metals LLC - Financial information (Details) - USD ($) $ in Thousands	3 Months Ended
	Feb. 28, 2025	Feb. 29, 2024	Nov. 30, 2024
The carrying value of equity method investment
Investment in Ambler Metals, Beginning	$ 107,497
Share of loss on equity investment	(581)	$ (793)
Investment in Ambler Metals, Ending	106,916
Assets [Abstract]
Total assets	132,390		$ 133,697
Cash and cash equivalents	25,213		25,834
Liabilities [Abstract]
Total liabilities	(800)		(903)
Operating Income (Loss) [Abstract]
General and administrative	343	415
Professional fees	447	200
Foreign exchange (gain)/loss	(11)	2
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Assets [Abstract]
Total assets	38,688		39,961
Cash and cash equivalents	6,504		7,472
Mineral properties	30,899		30,899
Liabilities [Abstract]
Total liabilities	(651)		(761)
Accounts payable and accrued liabilities	(494)		(559)
Members' equity (total assets less total liabilities)	38,037		$ 39,200
Operating Income (Loss) [Abstract]
Depreciation	32	38
Corporate salaries and wages	35	234
General and administrative	99	127
Mineral property expense	747	1,094
Professional fees	312	177
Foreign exchange (gain)/loss		2
Interest and other income	(63)	(87)
Comprehensive loss	1,162	$ 1,585
Ambler Metals LLC
The carrying value of equity method investment
Investment in Ambler Metals, Beginning	107,497
Share of loss on equity investment	(581)
Investment in Ambler Metals, Ending	$ 106,916