Quarterly report pursuant to Section 13 or 15(d)

Inventories (Tables)

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Inventories (Tables)
3 Months Ended
Oct. 31, 2012
Inventory Disclosure [Abstract]  
Inventories
    October 31,
2012
    April 30,
2012
 
Raw materials   $ 2,963,302     $ 1,921,151  
Work in process     8,234       29,767  
Finished goods     846,541       981,154  
    $ 3,818,077     $ 2,932,072