Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment (Details)

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Property, Plant and Equipment (Details) (USD $)
 12 Months Ended
Dec. 28, 2013
Dec. 29, 2012
Dec. 31, 2011
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment, gross $ 80,112,384 $ 69,001,887  
Less accumulated depreciation 44,229,008 40,966,957  
Property, plant and equipment, net 35,883,376 28,034,930  
Depreciation expense 3,516,374 2,831,718 2,631,864
Land [Member]
      
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment, gross 912,213 732,213  
Land Improvements [Member]
      
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment, gross 713,545 707,286  
Building [Member]
      
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment, gross 21,082,454 16,225,324  
Machinery, fixtures and equipment [Member]
      
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment, gross 52,381,064 47,588,233  
Construction-in-progress [Member]
      
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment, gross $ 5,023,108 $ 3,748,831