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Stock-Based Compensation (Details 4) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Exercise price $ 2.20 $ 1.14
Expected dividends 0.00% 0.00%
Expected volatility 110.00% 174.00%
Risk free interest rate 0.26% 0.71%
Expected life of warrant 2 years 5 years