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(3) Net Income Per Common and Common Equivalent Share (Tables)
9 Months Ended
Sep. 26, 2015
Income Statement [Abstract]  
Calculation of both basic and diluted EPS
  Three Months Ended    Nine Months Ended  
    Sept. 26,      Sept. 27,      Sept. 26,      Sept. 27  
     2015      2014      2015      2014  
Basic EPS Computation:                    
Numerator:                    
Net income  $8,249   $194,065   $195,868   $384,267 
Denominator:                    
Weighted average                    
Common shares                    
Outstanding   13,197,827    13,091,819    13,174,598    13,082,135 
Basic EPS  $0.00   $0.01   $0.01   $0.03 
Diluted EPS Computation:                    
Numerator:                    
Net income  $8,249   $194,065   $195,868   $384,267 
Denominator:                    
Weighted average                    
Common shares                    
Outstanding   13,197,827    13,091,819    13,174,598    13,082,135 
Dilutive effect of stock options   414,129    646,134    482,290    634,243 
Total Shares   13,611,956    13,737,953    13,656,888    13,716,378 
Diluted EPS  $0.00   $0.01   $0.01   $0.03