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Note 12 - Earnings Per Share of Common Stock (Tables)
 6 Months Ended
Apr. 01, 2017
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
    
Six Months Ended
  
   
April 1,
    
April 2,
    
April 1,
    
April 2,
  
   
2017
    
2016
    
2017
    
2016
  
Numerator for basic and diluted earnings per share:
                                
Net income
   $
1,713,475
    $
757,749
    $
2,676,367
    $
1,900,501
 
                                 
Denominator:
                                
Denominator for basic earnings per share:
                                
Weighted average shares
    
2,755,625
     
2,728,633
     
2,755,625
     
2,727,380
 
Effect of dilutive securities:
                                
Employee stock options
    
18,783
     
26,476
     
16,852
     
26,110
 
Denominator for diluted earnings per share:
                                
Adjusted weighted average shares
and assumed conversions
    
2,774,408
     
2,755,109
     
2,772,477
     
2,753,490
 
                                 
Net income per share:
                                
Basic
   $
0.62
    $
0.28
    $
0.97
    $
0.70
 
Diluted
   $
0.62
    $
0.28
    $
0.97
    $
0.69