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Summary of Significant Accounting Policies (Details)
9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Company's potential common stock    
Net Loss Per Share 5,706,459 28,664,004
Convertible preferred stock [Member]
   
Company's potential common stock    
Net Loss Per Share   24,332,186
Options to purchase common stock [Member]
   
Company's potential common stock    
Net Loss Per Share 5,396,959 4,172,318
Warrants to purchase common stock [Member]
   
Company's potential common stock    
Net Loss Per Share 309,500 159,500