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Inventories
9 Months Ended
Jan. 31, 2013
Inventories [Abstract]  
Inventory Disclosure [Text Block]

NOTE 3—INVENTORIES

The following table summarizes the components of inventories:

 
January 31, 2013
April 30, 2012
Raw materials
$
971,000

$
848,000

Work in process
291,000

296,000

Finished goods
261,000

85,000

 
$
1,523,000

$
1,229,000