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Stock Options and Warrants - Schedule of Fair Value Assumptions (Details) - $ / shares
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Weighted average fair value of options granted (in dollars per share) $ 5.65 $ 3.78
Expected dividend yield 0.00% 0.00%
Expected volatility 101.60% 103.80%
Risk—free interest rate 1.64% 1.47%
Expected life of options (in years) 5 years 5 years