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Inventories (Tables)
 9 Months Ended
Jan. 31, 2013
Inventories [Abstract]  
Components Of Inventories

 

 

 

 

 

 

 

 

 

January 31,

 

April 30,

(in thousands)

 

2013

 

2012

Raw materials

 

$
11,705 

 

$
9,412 

Work-in-process

 

 
16,349 

 

 
14,543 

Finished goods

 

 
10,275 

 

 
8,734 

 

 

 

 

 

 

 

Total FIFO inventories

 

 
38,329 

 

 
32,689 

 

 

 

 

 

 

 

Reserve to adjust inventories to LIFO value

 

 
(10,185)

 

 
(10,349)

 

 

 

 

 

 

 

Total LIFO inventories

 

$
28,144 

 

$
22,340