v2.4.0.8
Stock-Based Compensation (Details) (Stock Options [Member])
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Stock Options [Member]
   
Weighted-average assumptions    
Expected dividend yield 0.00% 0.00%
Expected stock price volatility, minimum 105.00% 109.00%
Expected stock price volatility, maximum 108.00% 112.00%
Risk-free interest rate, minimum 2.68% 2.32%
Risk-free interest rate. maximum 3.58% 2.70%
Expected life of options, minimum (Years) 11 days 1 year 6 months
Expected life of options, maximum (Years) 9 years 8 months 16 days 9 years 6 months