Annual report pursuant to Section 13 and 15(d)

Equity-Based Compensation (Details)

v2.4.0.6
Equity-Based Compensation (Details)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Schedule of stock options      
Risk-free interest rate, Minimum 0.34% 0.09% 1.30%
Risk-free interest rate, Maximum 1.61% 2.61% 2.70%
Expected volatility   69.00%  
Expected volatility, Minimum 41.00%   69.00%
Expected volatility, Maximum 68.00%   74.00%
Expected dividend yield 0.00% 0.00% 0.00%
Minimum [Member]
     
Schedule of stock options      
Expected term (in years) 3 years 1 year 7 months 6 days
Maximum [Member]
     
Schedule of stock options      
Expected term (in years) 7 years 7 years 7 years