Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Assets and Liabilities - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail)

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Fair Value of Assets and Liabilities - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)
 6 Months Ended 9 Months Ended
Jun. 30, 2014
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]        
Change in fair value of the derivative warrant liability $ 28,448 $ 28,448 $ 21,910  
Derivative warrant liability recorded for warrants issued       19,932
Fair Value, Measurements, Recurring [Member]
        
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]        
Derivative warrant liability at December 31, 2012 19,932 19,932    
Change in fair value of the derivative warrant liability   28,448    
Reclassification of derivative warrant liability   (48,380)    
Derivative warrant liability at September 31, 2013     21,910  
Fair Value, Measurements, Recurring [Member] | Warrant [Member]
        
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]        
Derivative warrant liability recorded for warrants issued     21,910  
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
        
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]        
Derivative warrant liability at December 31, 2012 19,932 19,932    
Change in fair value of the derivative warrant liability   28,448    
Reclassification of derivative warrant liability   (48,380)    
Derivative warrant liability at September 31, 2013     21,910  
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Warrant [Member]
        
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]        
Derivative warrant liability recorded for warrants issued     $ 21,910