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Summary Basic and Diluted Earnings Per Share and Additional Income (Detail) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Numerator:    
Net (loss) for basic earnings per share $ (9,092,598)  
Subtractions:    
Change in fair value of derivative securities (2,230,476)  
Net (loss) for diluted earnings per share (11,323,074)  
Denominator:    
Weighted average basic shares outstanding 118,764,366  
Assumed conversion of dilutive securities    
Warrants 0  
Conversion feature - debentures 13,515,850  
Potentially dilutive common shares $ 13,515,850  
Denominator for diluted earnings per share - Adjusted weighted average shares 132,280,216  
(Loss) per share    
Basic $ (0.08)  
Diluted net loss per share $ (0.09) $ (0.04)