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Warrant Activity (Detail) (USD $)
3 Months Ended
Mar. 31, 2014
Number of Shares Issuable  
Granted 45,587,479
Weighted Average Exercise Price  
Granted $ 0.69
Warrant
 
Number of Shares Issuable  
Balance, Beginning 41,595,655
Granted 5,310,901
Exercised (83,768)
Cancelled (1,235,309)
Balance, Ending 45,587,479
Weighted Average Exercise Price  
Balance, Beginning $ 0.69
Granted $ 0.74
Exercised $ 0.60
Cancelled $ 0.89
Balance, Ending $ 0.69