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Inventories
3 Months Ended
Jul. 31, 2013
Inventory Disclosure [Abstract]  
Inventories

D. Inventories

Inventories consisted of the following (in thousands):

 

     July 31, 2013      April 30, 2013  

Finished products

   $ 3,208       $ 4,052   

Work in process

     1,719         1,678   

Raw materials

     7,407         7,473   
  

 

 

    

 

 

 
   $ 12,334       $ 13,203   
  

 

 

    

 

 

 

For interim reporting, LIFO inventories are computed based on year-to-date quantities and interim changes in price levels. Changes in quantities and price levels are reflected in the interim consolidated financial statements in the period in which they occur.