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Stock-Based Compensation (Details 4) (USD $)
6 Months Ended
Jun. 30, 2014
Summary of outstanding warrants to purchase common stock  
Shares 3,355,073
August 2009 Employee Warrants [Member]
 
Summary of outstanding warrants to purchase common stock  
Issue Date Aug. 25, 2009
Exercise Price $ 0.50
Shares 80,000
Expiration Date Aug. 25, 2016
2007 Debt Extension Warrants [Member]
 
Summary of outstanding warrants to purchase common stock  
Issue Date Sep. 22, 2010
Exercise Price $ 1.00
Shares 16,000
Expiration Date Sep. 22, 2015
December 2010 Employee Warrants [Member]
 
Summary of outstanding warrants to purchase common stock  
Issue Date Dec. 03, 2010
Exercise Price $ 1.63
Shares 200,000
Expiration Date Dec. 03, 2015
February 2011 Legal Advisor Warrant [Member]
 
Summary of outstanding warrants to purchase common stock  
Issue Date Feb. 22, 2011
Exercise Price $ 2.50
Shares 80,000
Expiration Date Feb. 22, 2016
March 2011 Investor Warrants One [Member]
 
Summary of outstanding warrants to purchase common stock  
Issue Date Apr. 07, 2011
Exercise Price $ 3.13
Shares 34,100
Expiration Date Apr. 07, 2016
March 2011 Investor Warrants [Member]
 
Summary of outstanding warrants to purchase common stock  
Issue Date Mar. 09, 2011
Exercise Price $ 3.13
Shares 349,974
Expiration Date Mar. 09, 2016
September 2011 Employee Warrant [Member]
 
Summary of outstanding warrants to purchase common stock  
Issue Date Sep. 12, 2011
Exercise Price $ 3.90
Shares 20,000
Expiration Date Dec. 09, 2014
May 2014 Agent Warrant [Member]
 
Summary of outstanding warrants to purchase common stock  
Issue Date May 15, 2015
Exercise Price $ 5.09
Shares 75,000
Expiration Date Nov. 15, 2015
May 2014 Investor Warrant [Member]
 
Summary of outstanding warrants to purchase common stock  
Issue Date May 15, 2015
Exercise Price $ 5.09
Shares 2,500,000
Expiration Date Nov. 15, 2015