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Common Stock Options (Details 1) - USD ($)
6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Expected life in years 5 years 6 months  
Weighted Avg. Expected Volatility 94.40%  
Expected dividend yield $ 0 $ 0
Minimum    
Weighted average risk-free interest rate 1.49% 1.43%
Expected life in years   4 years 6 months
Weighted Avg. Expected Volatility   99.50%
Maximum    
Weighted average risk-free interest rate 1.71% 1.62%
Expected life in years   5 years 6 months
Weighted Avg. Expected Volatility   105.30%