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Note 5 Inventories
9 Months Ended
Dec. 31, 2012
Inventory Net [Abstract]  
Inventory Disclosure [Text Block]

5. Inventories

Inventories consist of the following (in thousands):

  December 31, March 31,
  2012 2012
       
  (unaudited)
 Raw materials$ 19,577 $ 23,200
 Work in process  40,541   41,570
 Finished goods  27,266   21,470
  Total$ 87,384 $ 86,240