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Stockholders' Equity (Tables)
9 Months Ended
Sep. 30, 2015
Stockholders' Equity [Abstract]  
Schedule of warrant activity

 

    Warrant
Shares
    Weighted
Average
Exercise
Price
 
Outstanding, December 31, 2014     21,212,813     $ 1.19  
Exercised warrants     (2,500 )     0.28  
Warrants issued to vendor     104,315       0.68  
Warrants issued to Series D Preferred holders     3,437,500       0.40  
Expired warrants     (86,345 )     37.60  
Outstanding, September 30, 2015     24,665,783     $ 0.95  
Expiring in 2015     199,000          
Expiring in 2016     -          
Expiring in 2017     7,235,622          
Expiring thereafter     17,231,161