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Investment in Ambler Metals LLC - Narrative (Details)
3 Months Ended 12 Months Ended
Feb. 11, 2020
USD ($)
Owner
Feb. 29, 2024
USD ($)
shares
Feb. 28, 2023
USD ($)
Nov. 30, 2023
USD ($)
Schedule of Equity Method Investments [Line Items]        
Loss for the year   $ (3,601,000) $ (5,072,000)  
Investment in Ambler Metals   134,340,000   $ 135,021,000
Ambler Metals LLC        
Schedule of Equity Method Investments [Line Items]        
Joint venture, contributed amount   112,000    
Contribution made to joint venture   $ 112,000    
Joint venture contribution made in common shares | shares   143,507    
Percentage of ownership 50.00% 50.00%    
Loss for the year   $ (1,600,000) $ (3,000,000.0)  
Number of board members | Owner 4      
Number of members appointed by Trilogy | Owner 2      
Investment in Ambler Metals $ 176,000,000 134,340,000    
Maximum exposure to loss   134,000,000    
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    
Percentage of ownership 50.00% 50.00%    
Ambler Metals        
Schedule of Equity Method Investments [Line Items]        
Operating expenses   $ 16,000   $ 0
South32        
Schedule of Equity Method Investments [Line Items]        
Contribution made to joint venture $ 145,000,000