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Inventories (Schedule of Inventories, Current) (Details) - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Raw materials and work in process $ 3,156,002 $ 2,810,711
Consigned inventory 249,964 277,324
Finished goods, net of reserve 3,331,882 2,283,694
Total inventories $ 6,737,848 $ 5,371,729