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Revenues By Geographic Areas (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Revenues: $ 3,981,055 $ 5,622,093
United States    
Revenues: 3,004,970 4,341,648
Europe    
Revenues: 643,749 1,099,682
Asia and rest of world    
Revenues: $ 332,336 $ 180,763