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Inventories (Tables)
 6 Months Ended
Oct. 31, 2012
Inventories [Abstract]  
Components Of Inventories

 

 

 

 

 

 

 

 

 

October 31,

 

April 30,

(in thousands)

 

2012

 

2012

Raw materials

 

$
11,370 

 

$
9,412 

Work-in-process

 

 
17,301 

 

 
14,543 

Finished goods

 

 
9,592 

 

 
8,734 

 

 

 

 

 

 

 

Total FIFO inventories

 

 
38,263 

 

 
32,689 

 

 

 

 

 

 

 

Reserve to adjust inventories to LIFO value

 

 
(10,171)

 

 
(10,349)

 

 

 

 

 

 

 

Total LIFO inventories

 

$
28,092 

 

$
22,340