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Stock-Based Compensation (Details)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Consultant [Member]
   
Risk free interest rate 0.30% 0.60%
Option Life 5 years 5 years
Volatility 53.00% 58.00%
Employee Stock Option [Member]
   
Risk free interest rate 0.80%  
Option Life 5 years  
Volatility 71.00%