v2.4.0.8
Stock Based Compensation (Details) (Stock options [Member])
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Stock options [Member]
   
Weighted-average assumptions used to fair value calculation for options granted    
Expected dividend yield 0.00% 0.00%
Expected stock price volatility 112.00% 108.00%
Risk-free interest rate 3.63%  
Risk-free interest rate, minimum   2.60%
Risk-free interest rate, maximum   2.68%
Expected life of options, minimum (Years) 1 month 21 days 5 months 19 days
Expected life of options, maximum (Years) 9 years 9 months 11 days 9 years 9 months 11 days