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Inventories (Details) (USD $)
Jun. 30, 2013
Sep. 30, 2012
Inventories    
Raw materials $ 1,724,054 $ 1,301,145
Work-in-process 2,820,200 3,251,644
Finished goods 4,790,904 5,330,862
Inventories, net $ 9,335,158 $ 9,883,651