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Inventories
6 Months Ended
Oct. 31, 2011
Note 3 — Inventories [Abstract]  
Inventory Disclosure [Text Block]
Inventories
 
The components of inventories are summarized as follows:
 
 
October 31,
2011
April 30,
2011
Raw materials
$
788,000

$
983,000

Work in process
429,000

300,000

Finished goods
131,000

118,000

 
$
1,348,000

$
1,401,000