Annual report pursuant to Section 13 and 15(d)

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

v3.3.1.900
Property and Equipment, Net - Summary of Property and Equipment (Detail) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]    
Property and equipment at cost $ 4,449,442 $ 4,234,994
Accumulated depreciation (2,286,671) (2,182,773)
Property and equipment, net 2,162,771 2,052,221
Laboratory Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment at cost 3,701,517 3,840,368
Office and Computer Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment at cost 443,562 343,835
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment at cost $ 304,363 $ 50,791