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Operating Leases (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
May 31, 2016
Deferred Rent Credit $ 767,706   $ 785,031  
Operating leases, rent expense 222,683 $ 221,488    
Security deposit paid $ 52,320   $ 52,320  
Rockville        
Security deposit paid       $ 52,320