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INVENTORIES
3 Months Ended
Mar. 31, 2012
INVENTORIES  
INVENTORIES
5.    INVENTORIES
 
    Inventories are stated at the lower of cost (first-in, first-out method) or market.  Inventories consist of the following:

   
March 31, 2012
  
December 31, 2011
 
        
Raw materials
 $4,641  $4,579 
Work in process
  7,932   8,113 
Finished goods
  5,782   7,041 
Total
 $18,355  $19,733