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Revenue (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Disaggregation of Revenue [Line Items]    
Total $ 2,881,185 $ 3,543,930
United States [Member]    
Disaggregation of Revenue [Line Items]    
Total 2,595,616 2,796,176
Other States [Member]    
Disaggregation of Revenue [Line Items]    
Total $ 285,569 $ 747,754