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Revenues By Geographic Areas (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Revenues: $ 4,192,331 $ 5,805,605 $ 8,173,386 $ 11,427,699
United States        
Revenues: 3,311,626 4,666,816 6,316,596 9,008,465
Europe        
Revenues: 639,640 831,526 1,283,389 1,931,208
Asia and rest of world        
Revenues: $ 241,065 $ 307,263 $ 573,401 $ 488,026