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Inventories
6 Months Ended
Jun. 30, 2011
Inventories [Abstract]  
Inventories
Note 4. Inventories
The components of inventories were as follows:
                 
    June 30,     December 31,  
    2011     2010  
    (in thousands)  
Raw materials
  $ 19,617     $ 18,488  
Work in process
    11,329       20,182  
 
           
Inventories
  $ 30,946     $ 38,670