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Financial instruments - Narrative (Details)
3 Months Ended
Feb. 28, 2023
USD ($)
Mar. 01, 2023
USD ($)
Feb. 28, 2023
CAD ($)
Nov. 30, 2022
USD ($)
Cash $ 1,682,000     $ 2,573,000
Accounts receivable $ 26,000     $ 17,000
Subsequent Event        
Accrued salaries   $ 155,000    
10% change in the US-Canadian exchange rate        
Cash     $ 71,000  
Accounts receivable     35,000  
Accounts payable     $ 320,000  
Change in foreign exchange rate 10.00%   10.00%  
Foreign exchange loss $ 35,000      
1% change in interest rates        
Change in interest rate 1.00%   1.00%