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Investment in Ambler Metals LLC - Narrative (Details)
3 Months Ended
Feb. 11, 2020
USD ($)
Owner
Feb. 28, 2023
USD ($)
shares
Feb. 28, 2022
USD ($)
Nov. 30, 2022
USD ($)
Schedule of Equity Method Investments [Line Items]        
Joint venture, contributed amount   $ 111,000    
Comprehensive (loss) earnings for the year   (5,072,000) $ (5,023,000)  
Ambler Metals LLC        
Schedule of Equity Method Investments [Line Items]        
Joint venture, contributed amount   111,000    
Contribution made to joint venture   $ 111,000    
Joint venture contribution made in common shares | shares   143,505    
Percentage of ownership 50.00% 50.00%    
Comprehensive (loss) earnings for the year   $ (3,000,000.0) $ (3,800,000)  
Number of board members | Owner 4      
Number of members appointed by Trilogy | Owner 2      
Maximum exposure to loss   141,400,000    
Fair value ascribed to Ambler Metals LLC interest       $ 142,754,000
South32 | Ambler Metals LLC        
Schedule of Equity Method Investments [Line Items]        
Contribution made to joint venture   $ 111,000    
Percentage of ownership 50.00% 50.00%    
South32        
Schedule of Equity Method Investments [Line Items]        
Contribution made to joint venture $ 145,000,000