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Inventories
9 Months Ended
Jan. 31, 2013
Inventories [Abstract]  
Inventories

B. Inventories

Inventories consisted of the following (in thousands):

 

                 
    January 31, 2013     April 30, 2012  

Finished products

  $ 3,692     $ 3,570  

Work in process

    1,737       1,831  

Raw materials

    7,459       6,359  
   

 

 

   

 

 

 
    $ 12,888     $ 11,760  
   

 

 

   

 

 

 

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.