Investment in Ambler Metals LLC - Financial information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2023	May 31, 2022	Nov. 30, 2022	Feb. 11, 2020
The carrying value of equity method investment
Share of loss on equity investment	$ (1,603)	$ (2,460)	$ (3,088)	$ (4,370)
Investment in Ambler Metals	139,777		139,777		$ 142,754
Assets [Abstract]
Total assets	144,258		144,258		145,995
Cash	4,166		4,166		2,573
Liabilities [Abstract]
Total liabilities	(728)		(728)		(567)
Ambler Metals' Net Loss
General and administrative	328	338	736	735
Professional Fees	188	192	758	437
Foreign exchange (gain) loss	2	1	(2)	4
Ambler Metals
Assets [Abstract]
Total assets	106,365		106,365		114,049
Cash	72,785		72,785		80,755
Mineral properties	30,899		30,899		30,899
Liabilities [Abstract]
Total liabilities	(2,606)		(2,606)		(4,335)
Accounts payable and accrued liabilities	(2,053)		(2,053)		(3,664)
Members' equity (total assets less total liabilities)	103,759		103,759		109,714
Ambler Metals' Net Loss
Depreciation	38	22	75	45
Corporate salaries and wages	495	486	939	960
General and administrative	213	169	346	401
Mineral property expense	2,507	4,367	4,792	7,407
Professional Fees	57	205	216	502
Foreign exchange (gain) loss	3	(7)	3	(5)
Interest income	(105)	(322)	(194)	(570)
Comprehensive loss	3,208	$ 4,920	6,177	$ 8,740
Ambler Metals LLC
The carrying value of equity method investment
Investment in Ambler Metals					$ 142,754
Joint venture, contributed amount	111		111
Share of loss on equity investment			(3,088)
Investment in Ambler Metals	$ 139,777		$ 139,777			$ 176,000