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Operating expenses (Tables)
12 Months Ended
Oct. 31, 2018
Statements Line Items  
Disclosure of detailed information about components of general and administrative expenses
      2018     2017     2016  
  General and administrative $  63,936   $  98,187   $  189,912  
  Rent and occupancy   70,674     72,725     72,317  
  Office insurance   117,615     54,023     60,195  
  Investor relations, listing and filing fees   53,113     80,486     72,916  
    $  305,338   $  305,421   $  395,340  
Disclosure of detailed information about components of professional, other fees and salaries
      2018     2017     2016  
  Professional fees $ 165,685     $ 224,139     $ 328,851  
  Consulting fees                316,815     813,735     1,028,600  
  Salaries and benefits                264,780     395,239     381,950  
    $ 747,280     $ 1,433,113     $ 1,739,401