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Fair Value Measurements (Narrative) (Details) - USD ($)
6 Months Ended
Jun. 30, 2015
Dec. 31, 2014
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Cash equivalents invested in money market funds $ 1,019,571 $ 5,361,053
Quoted Prices In Active Markets For Identical Instruments (Level 1) [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Cash equivalents invested in money market funds $ 1,019,571 $ 5,361,053
Significant Unobservable Inputs (Level 3) [Member] | Warrants Issued May 10, 2012 [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Warrant expiration date May 01, 2018  
Volatility rate 172.12%  
Risk-free interest rate 1.01%  
Closing stock price $ 1.44  
Significant Unobservable Inputs (Level 3) [Member] | Warrants Issued August 2013 [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Warrant expiration date Nov. 01, 2018  
Volatility rate 165.18%  
Risk-free interest rate 1.01%  
Closing stock price $ 1.44