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Note 8 - Net Loss Per Share (Tables)
 3 Months Ended
Jan. 31, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three months ended
 
   
January 31,
  
   
2019
    
2018
  
Net loss (numerator)
   $
(3,310,020
 )   $
(410,135
 )
Shares (denominator)
    
7,536,561
      
6,667,595
  
Basic and diluted net loss per share
   $
(0.44
 )   $
(0.06
 )