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Fair Value of Financial Instruments - Additional Information (Detail) (USD $)
0 Months Ended 0 Months Ended 6 Months Ended
May 07, 2014
Jun. 30, 2014
Apr. 18, 2014
Dec. 31, 2013
Mar. 29, 2013
Mar. 29, 2013
Warrant 1-1 and 1-5 [Member]
Mar. 29, 2013
Warrant 1-6 [Member]
Apr. 18, 2014
Warrant [Member]
May 07, 2014
Black Scholes Model [Member]
Apr. 18, 2014
Black Scholes Model [Member]
Jun. 30, 2014
Black Scholes Model [Member]
Class of Warrant or Right [Line Items]                      
Number of warrants issued               1,141,000      
Common stock, shares issued   97,050,674 1,192,500 95,814,565              
Fair value assumption, expected volatility                 97.60% 99.30% 66.00%
Fair value assumption, risk free interest rate                 0.90% 0.20% 1.00%
Fair value assumption, expected term                 3 years 1 year 6 months 5 years
Fair value assumption, expected dividend yield                 0.00% 0.00% 0.00%
Grant date fair value of the initial warrant valuation $ 1.61 $ 2.56 $ 0.99                
Issue of warrants for services 200,000                    
Closing market price of common stock         $ 3.00            
Number of shares, exercisable right 100,000 1,441,000     6,905,576   500,000        
Exercise price of warrants         0.37            
Warrant outstanding, number value           $ 20,233,338          
Warrant converted, number value             $ 1,465,000