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Inventories (Tables)
3 Months Ended
Jul. 31, 2012
Inventories [Abstract]  
Inventories

Inventories consisted of the following (in thousands):

 

                 
    July 31, 2012     April 30, 2012  

Finished products

  $ 3,233     $ 3,570  

Work in process

    1,944       1,831  

Raw materials

    6,540       6,359  
   

 

 

   

 

 

 
    $ 11,717     $ 11,760