Annual report pursuant to Section 13 and 15(d)

Property and Equipment, net - Schedule of Property and Equipment, Net (Detail)

v3.2.0.727
Property and Equipment, net - Schedule of Property and Equipment, Net (Detail) - USD ($)
Dec. 31, 2013
Dec. 31, 2012
Property, Plant and Equipment [Line Items]    
Property and equipment - at cost $ 1,366,935 $ 1,258,441
Less accumulated depreciation (1,214,332) (1,136,359)
Property and equipment - net 152,603 122,082
Office And Computer Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment - at cost 190,878 162,111
Laboratory Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment - at cost 1,106,761 1,028,417
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment - at cost $ 69,296 $ 67,913