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Operating Leases - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Operating Leased Assets [Line Items]        
Deferred rent related to lease $ 186,526   $ 186,526  
Rockville, Maryland [Member]        
Operating Leased Assets [Line Items]        
Period of operating lease     8 years  
Deferred rent related to lease 186,526   $ 186,526  
Operating leases, rent expense $ 216,765 $ 96,317 $ 437,125 $ 289,188