Annual report pursuant to Section 13 and 15(d)

Derivative Liability and Fair Value Measurements (Estimate the fair value of warrants outstanding) (Detail)

v3.3.1.900
Derivative Liability and Fair Value Measurements (Estimate the fair value of warrants outstanding) (Detail) - Monte Carlo Options Lattice Pricing Model Warrants Outstanding - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Assumptions for Pricing Model:    
Expected term in years 2 years 7 months 6 days  
Volatility range for years 103.00%  
Risk-free interest rate 1.06%  
Expected annual dividends 0.00% 0.00%
Value of warrants outstanding:    
Fair value of warrants $ 240,786 $ 10,734,196
Minimum    
Assumptions for Pricing Model:    
Expected term in years   3 years 2 months 16 days
Volatility range for years   81.00%
Risk-free interest rate   0.83%
Maximum    
Assumptions for Pricing Model:    
Expected term in years   3 years 9 months 11 days
Volatility range for years   89.00%
Risk-free interest rate   1.11%