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Inventories (Details) (USD $)
Sep. 30, 2014
Dec. 31, 2013
Sep. 30, 2013
Inventory Disclosure [Abstract]      
Finished goods $ 3,177,603 $ 3,027,900 $ 3,106,557
Production supplies 1,669,984 2,690,097 3,469,239
Raw materials 2,287,270 1,181,011 1,806,491
Total inventories $ 7,134,857 $ 6,899,008 $ 8,382,287