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Property and Equipment - Schedule of Property and Equipment (Details) - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Property Plant And Equipment [Line Items]    
Property and equipment, gross $ 4,256,517 $ 4,097,391
Less accumulated depreciation (2,874,188) (2,696,800)
Property and equipment, net 1,382,329 1,400,591
Lab Equipment    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 2,645,160 2,503,086
Computer Equipment    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 130,300 113,248
Computer Software    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 193,694 193,694
Furniture and Fixtures    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 266,960 266,960
Tenant Improvements    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 894,304 894,304
Other Office Equipment    
Property Plant And Equipment [Line Items]    
Property and equipment, gross $ 126,099 $ 126,099