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Inventories (Tables)
9 Months Ended
Jan. 31, 2015
Inventory Disclosure [Abstract]  
Summary of Inventories

Inventories consisted of the following (in thousands):

 

     January 31, 2015      April 30, 2014  

Finished products

   $ 3,137       $ 2,909   

Work in process

     1,412         1,550   

Raw materials

     7,881         7,479   
  

 

 

    

 

 

 
$ 12,430    $ 11,938