Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation - Additional Information (Detail)

v3.2.0.727
Basis of Presentation - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2013
Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]            
Revenues generated by company $ 242,038 $ 303,752 $ 605,812 $ 518,412    
Net loss 6,335,471 $ 1,895,519 7,628,248 3,536,403    
Cash used in operations     2,232,061 $ 3,280,502    
Accumulated deficit $ 83,572,883   $ 83,572,883     $ 75,944,635
Gross proceeds from issuance of common stock         $ 3,900,000  
Net proceeds through underwritten public offering         $ 9,904,996