Investment in Ambler Metals LLC - Narrative (Details)		3 Months Ended			9 Months Ended
	Feb. 11, 2020 USD ($) Owner	Aug. 31, 2024 USD ($) shares	May 31, 2024 USD ($)	Aug. 31, 2023 USD ($)	Aug. 31, 2024 USD ($) shares	Aug. 31, 2023 USD ($)	Nov. 30, 2023 USD ($)
Schedule of Equity Method Investments [Line Items]
Cash and cash equivalents		$ 25,738,000			$ 25,738,000		$ 2,590,000
Excess cash returned to members					25,000,000
Loss for the year		(1,591,000)		$ (4,052,000)	(6,951,000)	$ (11,927,000)
Investment in Ambler Metals		108,114,000			108,114,000		135,021,000
Ambler Metals LLC
Schedule of Equity Method Investments [Line Items]
Joint venture, contributed amount		112,000			112,000
Contribution made to joint venture		$ 112,000			$ 112,000
Joint venture contribution made in common shares | shares		143,507			143,507
Percentage of ownership	50.00%	50.00%			50.00%
Excess cash returned to members		$ 50,000,000	$ 50,000,000
Loss for the year		(1,200,000)		(5,800,000)	$ (4,000,000.0)	(12,000,000.0)
Number of board members | Owner	4
Number of members appointed by Trilogy | Owner	2
Investment in Ambler Metals		108,114,000			108,114,000
Maximum exposure to loss		108,100,000		$ 136,900,000	108,100,000	136,900,000
Fair value ascribed to Ambler Metals LLC interest							$ 135,021,000
South32 | Ambler Metals LLC
Schedule of Equity Method Investments [Line Items]
Contribution made to joint venture		$ 112,000			$ 112,000
Percentage of ownership	50.00%	50.00%			50.00%
Ambler Metals
Schedule of Equity Method Investments [Line Items]
Human resources and accounting services in connection with a service agreement					$ 47,000	0
Operating expenses					$ 64,000	$ 0
South32
Schedule of Equity Method Investments [Line Items]
Contribution made to joint venture	$ 145,000,000.0