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. 29, 2012
Dec. 31, 2011
Jan. 01, 2011
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment, gross $ 69,001,887 $ 58,546,600  
Less accumulated depreciation 40,966,957 39,833,076  
Property, plant and equipment, net 28,034,930 18,713,524  
Depreciation expense 2,831,718 2,631,864 2,631,785
Land [Member]
      
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment, gross 732,213 515,105  
Land Improvements [Member]
      
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment, gross 707,286 681,278  
Building [Member]
      
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment, gross 16,225,324 12,224,712  
Machinery, fixtures and equipment [Member]
      
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment, gross 47,588,233 42,747,487  
Construction-in-progress [Member]
      
Property, Plant and Equipment [Line Items]      
Total property, plant and equipment, gross $ 3,748,831 $ 2,378,018