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Inventories (Detail) - Schedule of inventory (USD $)
Sep. 30, 2012
Dec. 31, 2011
Dec. 31, 2010
Raw material $ 29,711 $ 28,667 $ 160,302
Work in progress 585,435 436,980 575,067
Finished goods 2,163,481 1,382,434 282,335
$ 2,778,627 $ 1,848,081 $ 1,017,704