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Segment Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Total revenue $ 37,674,524 $ 35,011,276
United States [Member]    
Total revenue 19,757,986 21,626,788
International [Member]    
Total revenue $ 17,916,538 $ 13,384,488