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Inventories
12 Months Ended
Mar. 31, 2011
Notes to Financial Statements [Abstract]  
Inventories
9.            INVENTORIES
 
Inventories consist of the following (amounts in thousands):

   
March 31,
 
   
2011
  
2010
 
Raw materials
 $8,174  $4,912 
Work in process
  141,462   100,607 
Finished goods
  31,164   11,060 
   $180,800  $116,579