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Summary of the Status of the Warrants Granted (Detail) (Warrant, USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Warrant
   
Shares    
Beginning Balance 59,066,992 25,903,032
Granted 25,509,506 33,178,830
Expired   0
Expired on exchange to new warrant (4,024,286)  
Issued on exchange to new warrant 7,377,582  
Exercised 0 (14,870)
Ending Balance 87,929,794 59,066,992
Exercisable 87,929,794 59,066,992
Weighted Average Exercise Price    
Outstanding $ 0.18 $ 0.30
Granted $ 0.08 $ 0.09
Expired   $ 0
Expired on exchange to new warrant $ 0.11  
Issued on exchange to new warrant $ 0.09  
Exercised $ 0 $ 0.08
Outstanding $ 0.15 $ 0.18
Exercisable $ 0.15 $ 0.18
Weighted Average Fair Value    
Granted $ 0.05 $ 0.08