Annual report pursuant to Section 13 and 15(d)

Derivative Liability and Fair Value Measurement (Additional Information) (Detail)

v2.4.0.8
Derivative Liability and Fair Value Measurement (Additional Information) (Detail) (USD $)
0 Months Ended 1 Months Ended 12 Months Ended 0 Months Ended
Aug. 05, 2013
Jul. 15, 2013
Mar. 21, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Additional Warrants [Member]
Sep. 21, 2013
Public Equity Offering [Member]
Dec. 31, 2013
Public Equity Offering [Member]
Aug. 05, 2013
Public Equity Offering [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                    
Embedded Derivative, Fair Value of Embedded Derivative Liability   $ 200,000 $ 800,000              
Debt Conversion, Converted Instrument, Warrants or Options Issued 6,004,288 38,168 186,480              
Derivative Liability     9,067,283 12,035,816     526,245      
Derivative, Loss on Derivative       $ 3,575,278 $ 0          
Derivative Liability For The Warrants To Purchase 4,025,000                 127,717
Exercise Price Adjustment Feature Expired Warrants               102,357    
Derivative Liability For The Warrants To Purchase Outstanding       7,147,775 656,641 867,628     25,360