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Income Taxes - Summary of Federal Statutory Rate and Provision for Income (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 27, 2015
Jun. 28, 2014
Jun. 27, 2015
Jun. 28, 2014
Income Tax Disclosure [Abstract]        
Income tax expense at federal rate     $ 288,699  
State tax expense, net of Federal effect     35,884  
Permanent Differences:        
Meals and entertainment     12,014  
Officer's life insurance     557  
Domestic production activities deduction     (26,108)  
Total tax credits     (31,558)  
Total permanent differences     (45,095)  
Rounding     0  
Total income tax expense $ 280,980 $ 188,658 $ 279,488 $ (8,432)
Income tax expense at federal rate, percentage     34.00%  
State tax expense, net of Federal effect, percentage     4.23%  
Permanent Differences:        
Meals and entertainment, percentage     1.41%  
Officer's life insurance, percentage     0.07%  
Domestic production activities deduction, percentage     (3.07%)  
Total tax credits, percentage     (3.72%)  
Total permanent differences, percentage     (5.31%)  
Rounding, percentage     0.00%  
Total income tax expense     32.92%