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Note 6 Inventories
3 Months Ended
Jun. 30, 2013
Inventory Net [Abstract]  
Inventory Disclosure [Text Block]

6. Inventories

Inventories consist of the following (in thousands):

  June 30, March 31,
  2013 2013
       
  (unaudited)
 Raw materials$ 18,100 $ 17,349
 Work in process  41,940   41,036
 Finished goods  26,857   25,444
  Total$ 86,897 $ 83,829