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Inventories - Inventories Table (Details) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Inventory Disclosure [Abstract]    
Finished goods $ 28,712,961us-gaap_InventoryFinishedGoodsNetOfReserves $ 26,004,042us-gaap_InventoryFinishedGoodsNetOfReserves
Work in process 522,377us-gaap_InventoryWorkInProcessNetOfReserves 186,507us-gaap_InventoryWorkInProcessNetOfReserves
Materials and supplies 4,435,860us-gaap_InventoryRawMaterialsAndSuppliesNetOfReserves 2,028,333us-gaap_InventoryRawMaterialsAndSuppliesNetOfReserves
Total inventories $ 33,671,198us-gaap_InventoryNet $ 28,218,883us-gaap_InventoryNet