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Property and Equipment - Schedule of Property and Equipment (Details) - USD ($)
Mar. 31, 2018
Dec. 31, 2017
Property Plant And Equipment [Line Items]    
Property and equipment, gross $ 3,916,659 $ 3,413,445
Less accumulated depreciation (2,498,002) (2,376,585)
Property and equipment, net 1,418,657 1,036,860
Lab Equipment    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 2,228,032 1,914,911
Computer Equipment    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 169,366 169,366
Computer Software    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 306,767 299,227
Furniture and Fixtures    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 202,218 202,218
Tenant Improvements    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 894,756 763,898
Other Office Equipment    
Property Plant And Equipment [Line Items]    
Property and equipment, gross $ 115,520 $ 63,825