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Inventories
9 Months Ended
Sep. 30, 2011
Inventories [Abstract] 
Inventories
3. Inventories
Inventories are classified as follows (in thousands):
                 
    September 30,     December 31,  
    2011     2010  
Raw materials
  $ 111     $ 333  
Work in process
    273       314  
Finished goods, net
    8,265       7,859  
 
           
Total inventories
  $ 8,649     $ 8,506