Annual report pursuant to Section 13 and 15(d)

Property, Equipment, and Leasehold Improvements - Schedule of Property, Equipment and Leasehold Improvements, at Cost (Detail)

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Property, Equipment, and Leasehold Improvements - Schedule of Property, Equipment and Leasehold Improvements, at Cost (Detail) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment [Line Items]    
Property, equipment, and leasehold improvements, at cost, gross $ 4,346,769 $ 4,153,761
Less: accumulated depreciation and amortization (3,246,821) (3,077,662)
Property, equipment, and leasehold improvements, at cost, net 1,099,948 1,076,099
Computer Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, equipment, and leasehold improvements, at cost, gross 19,691 19,691
Furniture [Member]    
Property, Plant and Equipment [Line Items]    
Property, equipment, and leasehold improvements, at cost, gross 434,697 434,697
Lab Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, equipment, and leasehold improvements, at cost, gross 1,864,368 1,844,369
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, equipment, and leasehold improvements, at cost, gross $ 2,028,013 $ 1,855,004