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Property, Plant and Equipment
6 Months Ended
Jul. 02, 2011
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
2. Property, Plant and Equipment
                 
    July 2,     December 31,  
    2011     2010  
Land and buildings
  $ 19,096     $ 19,096  
Machinery and equipment
    27,333       24,780  
Office furniture and equipment
    1,168       1,168  
Construction in process
    393       1,139  
 
           
Property, plant and equipment, at cost
    47,990       46,183  
Less accumulated depreciation
    31,014       30,203  
 
           
Property, plant and equipment, net
  $ 16,976     $ 15,980