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Investment in Ambler Metals LLC - Narrative (Details)
3 Months Ended 6 Months Ended
Feb. 11, 2020
USD ($)
Owner
May 31, 2025
USD ($)
May 31, 2024
USD ($)
May 31, 2025
USD ($)
May 31, 2024
USD ($)
Feb. 29, 2024
USD ($)
Schedule of Equity Method Investments [Line Items]            
Excess cash returned to members         $ 12,500,000  
Comprehensive loss   $ 2,177,000 $ 1,759,000 $ 5,800,000 5,360,000  
Ambler Metals LLC            
Schedule of Equity Method Investments [Line Items]            
Percentage of ownership 50.00% 50.00%   50.00%    
Comprehensive loss   $ 800,000 $ 600,000 $ 1,300,000 1,400,000  
Number of board members | Owner 4          
Number of members appointed by Trilogy | Owner 2          
Maximum exposure to loss   $ 106,200,000   106,200,000   $ 121,200,000
South32 | Ambler Metals LLC            
Schedule of Equity Method Investments [Line Items]            
Percentage of ownership 50.00%          
Ambler Metals            
Schedule of Equity Method Investments [Line Items]            
Human resources and accounting services in connection with a service agreement       13,000 25,000  
Operating expenses       $ 92,200 $ 52,000  
South32            
Schedule of Equity Method Investments [Line Items]            
Contribution made to joint venture $ 145,000,000