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Loss per share
 9 Months Ended 12 Months Ended
Jul. 31, 2021
Oct. 31, 2020
Text Block [Abstract]    
Loss per share
13.
Loss per share
 
     Three months ended
July 31
,		     
Nine months ended July 31,
  
    
2021
      2020     
2021
      2020  
Net loss
   
$
(6,897,318
) 
    $ (1,810,981 )    
$
(21,590,783
) 
    $ (4,842,463 ) 
Weighted average number of ordinary shares
   
 
2,394,475
 
      2,100,603     
 
2,372,731
 
      2,057,723  
    
 
 
     
 
 
     
 
 
     
 
 
  
Basic and diluted loss per share
   
$
(2.88
) 
    $ (0.86 )    
$
(9.10
) 
    $ (2.35 ) 
    
 
 
     
 
 
     
 
 
     
 
 
  
Adjustments for diluted loss per share were not made for the three and nine months ended July 31, 2021 and 2020 as they would be anti-dilutive in nature
. The following potential common shares are anti-dilutive and are therefore excluded from the weighted average number of common shares for the purpose of diluted earnings per share:
 
     Three months ended 
July 31
,		     
Nine months ended July 31,
  
    
2021
      2020     
2021
      2020  
Stock options
   
 
135,086
 
      133,500     
 
135,086
 
      133,500  
Restricted share units
   
 
9,501
 
      2,182     
 
9,501
 
      2,182  
    
 
 
     
 
 
     
 
 
     
 
 
  
    
 
144,587
 
      135,682     
 
144,587
 
      135,682  
    
 
 
     
 
 
     
 
 
     
 
 
  
16.
Loss per share
 
    
2020
      2019      2018  
Net loss
   
$
 (9,275,962
) 
    $  (4,100,782 )     $  (908,869 ) 
Weighted average number of ordinary shares
   
 
2,068,952
 
      1,801,338        1,700,751  
    
 
 
     
 
 
     
 
 
  
Basic and diluted loss per share
   
$
(4.48
) 
    $ (2.28 )     $ (0.53 ) 
    
 
 
     
 
 
     
 
 
  
Adjustments for diluted loss per share were not made for the year ended October 31, 2020, 2019 and 2018 as they would be anti-dilutive in nature. The following potential ordinary shares are anti-dilutive and are therefore excluded from the weighted average number of ordinary shares for the purpose of diluted earnings per share:​​​​​​​
 
    
2020
      2019      2018  
Stock options
   
 
133,500
 
      99,500        58,320  
Convertible debt
   
 
—  
 
      13,436        13,436  
Restricted share units
   
 
2,182
 
      —          —    
    
 
 
     
 
 
     
 
 
  
    
 
135,682
 
      112,936        71,756  
    
 
 
     
 
 
     
 
 
  
             
The number of potential ordinary shares to be issued upon the conversion of the convertible debt was determined based on the Series B share price. See Note 8 for details.