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Inventory (Details) (USD $)
Sep. 30, 2014
Dec. 31, 2013
Inventory.    
Raw materials and supplies $ 17,213,326 $ 8,881,596
Work-in-process 312,603 219,327
Finished goods 4,399,700 1,305,397
Total inventory $ 21,925,629 $ 10,406,320