v2.4.0.6
Stock Based Compensation (Details) (Stock Options [Member])
9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Stock Options [Member]
   
Weighted-average assumptions    
Expected dividend yield 0.00% 0.00%
Expected stock price volatility, minimum 96.00% 95.00%
Expected stock price volatility, maximum 97.00% 98.00%
Risk-free interest rate, minimum 2.37% 2.90%
Risk-free interest rate. maximum 2.70% 4.19%
Expected life of options, minimum (Years) 1 year 9 months 9 days 2 years 9 months 18 days
Expected life of options, maximum (Years) 9 years 9 months 18 days 10 years