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Property and Equipment (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Property, Plant and Equipment [Line Items]          
Property and equipment $ 2,672,109   $ 2,672,109   $ 2,540,868
Less accumulated depreciation (1,793,703)   (1,793,703)   (1,583,642)
Property and equipment, net 878,406   878,406   957,226
Depreciation of property and equipment 70,783 $ 68,477 211,391 $ 206,794  
Furniture and Fixtures          
Property, Plant and Equipment [Line Items]          
Property and equipment 345,712   345,712   334,300
Laboratory Equipment          
Property, Plant and Equipment [Line Items]          
Property and equipment 1,402,436   1,402,436   1,389,036
Office Equipment          
Property, Plant and Equipment [Line Items]          
Property and equipment 11,085   11,085   11,085
Computer Equipment          
Property, Plant and Equipment [Line Items]          
Property and equipment 296,744   296,744   233,282
Leasehold Improvements          
Property, Plant and Equipment [Line Items]          
Property and equipment $ 616,132   $ 616,132   $ 573,165