Quarterly report pursuant to Section 13 or 15(d)

Warrants - Additional Information (Detail)

v3.3.0.814
Warrants - Additional Information (Detail) - USD ($)
9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Class of Warrant or Right [Line Items]    
Issuance of common stock shares 1,969,250  
Weighted average exercise price of warrants $ 0.97  
Weighted average remaining life of warrants 3 years 7 months 6 days  
Number of shares purchased for warrants exercised 11,615,674 0
Net proceeds from warrants exercised $ 10,817,326  
Number of warrants issued 0  
Number of warrants cancelled 0 0
Number of shares purchased for warrants issued 13,435,373  
Warrant Agreement    
Class of Warrant or Right [Line Items]    
Issuance of common stock shares 255,724  
Number of shares purchased for warrants exercised 371,250