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Inventories
9 Months Ended
Oct. 02, 2011
Inventories [Abstract] 
INVENTORIES
3.   INVENTORIES
Inventories are stated at the lower of cost or market with cost determined under the first-in, first-out (FIFO) method. The composition of inventories was:
                 
    October 2, 2011     December 31, 2010  
Raw materials
  $ 17,754     $ 18,250  
Work in process
    4,381       6,649  
Finished goods
    7,347       8,223  
 
           
 
  $ 29,482     $ 33,122