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2. Inventory (Details) (USD $)
Sep. 30, 2012
Dec. 31, 2011
Inventory Details    
Raw materials $ 423,264 $ 628,366
Work-in-progress 1,769,224 2,056,771
Finished goods 1,813,979 1,296,860
Total inventory $ 4,006,467 $ 3,981,997