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Note 8 - Earnings Per Share of Common Stock (Tables)
 3 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
  
   
December 31,
    
January 2,
  
   
2016
    
2016
  
Numerator for basic and diluted earnings per share:
                
Net income
   $
962,892
    $
1,142,752
 
                 
Denominator:
                
Denominator for basic earnings per share:
                
Weighted average shares
    
2,755,625
     
2,726,127
 
Effect of dilutive securities:
                
Employee stock options
    
14,921
     
25,743
 
Denominator for diluted earnings per share:
                
Adjusted weighted average shares
and assumed conversions
    
2,770,546
     
2,751,870
 
                 
Net income per share:
                
Basic
   $
0.35
    $
0.42
 
Diluted
   $
0.35
    $
0.42