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Operating Leases (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
May 31, 2016
Deferred Rent Credit $ 732,387   $ 732,387   $ 785,031  
Operating leases, rent expense 227,342 $ 223,337 673,416 $ 667,507    
Security deposit paid $ 52,320   $ 52,320   $ 52,320  
Rockville            
Security deposit paid           $ 52,320