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Earnings per share (Tables)
 9 Months Ended
Jul. 31, 2015
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Weighted Average Shares Outstanding
The following table summarizes the computation of basic and diluted weighted average shares outstanding:
 
 
 
Three Months Ended July 31,
 
Nine Months Ended July 31,
 
 
 
2015
 
2014
 
2015
 
2014
 
 
 
 
 
 
 
Weighted average shares outstanding for basic earnings per share
 
 
8,545,300
 
 
8,250,042
 
 
8,446,223
 
 
8,200,476
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Add effects of potentially dilutive securities-assumed exercise of stock options
 
 
371,343
 
 
468,614
 
 
374,215
 
 
563,117
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Weighted average shares outstanding for diluted earnings per share
 
 
8,916,643
 
 
8,718,656
 
 
8,820,438
 
 
8,763,593