v2.4.0.8
M. Share-Based Compensation (Details-Assumptions) (Employee Stock Option [Member])
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Expected term (years) 6 years 3 months 6 years 3 months 6 years 3 months
Expected dividend yield 0.00% 0.00% 0.00%
Estimated forfeitures 10.00% 7.50% 13.00%
Minimum
     
Expected volatility 52.00%    
Risk-free interest rate 0.96%    
Maximum
     
Expected volatility 70.00%    
Risk-free interest rate 2.97%