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Summary of Weighted Average Assumptions to Value Stock Options Granted (Detail) (USD $)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected term of options 5 years 0 years
Exercise price      
Expected volatility 187.00% 0.00%
Expected dividends 0.00% 0.00%
Risk-free interest rate 1.64% 0.00%
Forfeitures $ 0 $ 0