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Property, Plant and Equipment (Details) (USD $)
 12 Months Ended
Dec. 28, 2013
Dec. 29, 2012
Dec. 31, 2011
Components of property, plant and equipment      
Total property, plant and equipment, gross $ 72,784,000 $ 62,932,000  
Accumulated depreciation (25,345,000) (19,719,000)  
Total property, plant and equipment, net 47,439,000 43,213,000  
Property, Plant and Equipment (Textual) [Abstract]      
Depreciation expense 5,400,000 4,800,000 3,300,000
Land [Member]
      
Components of property, plant and equipment      
Total property, plant and equipment, gross 15,569,000 15,573,000  
Building and improvements [Member]
      
Components of property, plant and equipment      
Total property, plant and equipment, gross 19,403,000 19,231,000  
Machinery and equipment [Member]
      
Components of property, plant and equipment      
Total property, plant and equipment, gross 29,671,000 21,523,000  
Furniture and fixtures [Member]
      
Components of property, plant and equipment      
Total property, plant and equipment, gross 2,308,000 2,228,000  
Capital in progress [Member]
      
Components of property, plant and equipment      
Total property, plant and equipment, gross $ 5,833,000 $ 4,377,000