Annual report pursuant to Section 13 and 15(d)

Property and Equipment, Net - Summary of Property and Equipment, Net (Detail)

v3.3.1.900
Property and Equipment, Net - Summary of Property and Equipment, Net (Detail) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 1,588,564 $ 1,666,319
Accumulated depreciation and amortization (1,447,913) (1,557,027)
Property and equipment, net 140,651 109,292
Furniture and Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 20,742 20,742
Laboratory Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 794,625 872,380
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 487,871 487,871
Office and Computer Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 285,326 $ 285,326