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Inventories (Tables)
9 Months Ended
Jan. 31, 2014
Inventory Disclosure [Abstract]  
Summary of Inventories

Inventories consisted of the following (in thousands):

 

     January 31, 2014      April 30, 2013  

Finished products

   $ 3,258       $ 4,052   

Work in process

     1,263         1,678   

Raw materials

     7,986         7,473   
  

 

 

    

 

 

 
   $ 12,507       $ 13,203