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Inventories (Details) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Inventory    
Raw materials $ 2,479,965us-gaap_InventoryRawMaterialsNetOfReserves $ 2,571,465us-gaap_InventoryRawMaterialsNetOfReserves
Finished goods 2,154,100us-gaap_InventoryFinishedGoodsNetOfReserves 3,028,854us-gaap_InventoryFinishedGoodsNetOfReserves
Total $ 4,634,065us-gaap_InventoryNet $ 5,600,319us-gaap_InventoryNet