Quarterly report pursuant to Section 13 or 15(d)

Inventories (Tables)

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Inventories (Tables)
3 Months Ended
Jan. 31, 2013
Inventory Disclosure [Abstract]  
Inventories
    January 31,
2013
  April 30,
2012
Raw materials   $ 1,779,951     $ 1,921,151  
Work in process     36,141       29,767  
Finished goods     1,096,545       981,154  
    $ 2,912,637     $ 2,932,072