Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

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Inventories (Details) (USD $)
Oct. 31, 2013
Apr. 30, 2013
Notes to Financial Statements    
Raw materials $ 1,207,336 $ 1,425,386
Work in process 206,433 88,603
Finished goods 767,974 1,389,065
Inventories $ 2,181,743 $ 2,903,054