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Note 15 - Shareholders' Equity (Tables)
 12 Months Ended
Oct. 31, 2016
Notes Tables  
Schedule of Share Repurchases [Table Text Block]
Fiscal years ended
October 31,
 
Shares
repurchased
 
 
Cost
 
2016
    
14,225
    $
40,150
 
2015
    
80,636
     
379,675
 
2014
    
44,464
     
195,206