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M. Share-Based Compensation (Details-Assumptions) (Employee Stock Option [Member])
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12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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|
| 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% |
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Minimum
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| Expected volatility | 52.00% | ||
| Risk-free interest rate | 0.96% | ||
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Maximum
|
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| Expected volatility | 70.00% | ||
| Risk-free interest rate | 2.97% | ||