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(3) Net Income (Loss) Per Common Equivalent Share (Tables)
3 Months Ended
Mar. 28, 2020
Earnings Per Share [Abstract]  
Calculation of basic and diluted EPS
     Three Months Ended  
     March 28,      March 30,  
     2020      2019  
Basic EPS Computation:              
Numerator:              
Net income (loss)  $601,654   $(744,214)
           
Denominator:          
Weighted average          
Common shares          
Outstanding   13,207,436    13,206,069 
           
Basic EPS  $0.05   $(0.06)
           
Diluted EPS Computation:          
Numerator:          
Net income (loss)  $601,654   $(744,214)
           
Denominator:          
Weighted average          
Common shares          
Outstanding   13,207,436    13,206,069 
Dilutive effect of stock options   39,695    —   
           
Total Shares   13,247,131    13,206,069 
           
Diluted EPS  $0.05   $(0.06)