Quarterly report pursuant to Section 13 or 15(d)

Inventories (Tables)

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Inventories (Tables)
3 Months Ended
Jul. 31, 2012
Inventory Disclosure [Abstract]  
Inventories
    July 31,
2012
    April 30,
2012
 
Raw materials   $ 2,484,142     $ 1,921,151  
Work in process     28,404       29,767  
Finished goods     1,288,775       981,154  
    $ 3,801,321     $ 2,932,072