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Note 9 - Employee Benefits (Tables)
12 Months Ended
Oct. 31, 2018
Notes Tables  
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
Nonvested shares
 
Shares
   
Weighted-average grant date fair value
 
Balance at October 31, 2017
   
836,958
    $
3.66
 
Granted
   
498,083
     
2.52
 
Vested
   
(257,955
)    
3.68
 
Forfeited
   
(49,384
)    
3.73
 
Balance at October 31, 2018
   
1,027,702
    $
3.13