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(3) Net Income Per Common and Common Equivalent Share - Calculation of both basic and diluted earnings per share (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 28, 2014
Jun. 29, 2013
Jun. 28, 2014
Jun. 29, 2013
Basic EPS Computation:        
Net income (loss) $ (57,417) $ 236,502 $ 190,202 $ 239,112
Weighted average common shares outstanding 13,087,905 12,961,506 13,078,741 12,916,633
Basic EPS $ 0.00 $ 0.02 $ 0.01 $ 0.02
Diluted EPS Computation:        
Net income (loss) (57,417) 236,502 190,202 239,112
Weighted average common shares outstanding 13,084,968 12,961,506 13,077,273 12,916,633
Dilutive effect of stock options    $ 129,578 $ 628,297 $ 185,222
Total Shares 13,084,968 13,091,084 13,705,570 13,101,855
Diluted EPS $ 0.00 $ 0.02 $ 0.01 $ 0.02