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Financial instruments - Narrative (Details)
9 Months Ended
Aug. 31, 2022
USD ($)
Sep. 01, 2022
USD ($)
Aug. 31, 2022
CAD ($)
Nov. 30, 2021
USD ($)
Accounts receivable $ 11,000     $ 19,000
Subsequent Event        
Accrued salaries and director fees   $ 207,000    
10% change in the US-Canadian exchange rate        
Cash     $ 54,000  
Accounts receivable     14,000  
Accounts payable     $ 320,000  
Change in foreign exchange rate 10.00%   10.00%  
Foreign exchange loss $ 19,000      
1% change in interest rates        
Change in interest rate 1.00%   1.00%