Stockholders' Equity (Summary Of Assumptions Used To Value Stock Option Grants Using Lattice-Binomial Model) (Details)
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3 Months Ended | 9 Months Ended | ||
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Sep. 30, 2012
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Sep. 30, 2011
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Sep. 30, 2012
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Sep. 30, 2011
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Stockholders' Equity Note [Abstract] | ||||
Dividend yield | 0.00% | 0.00% | 0.00% | 0.00% |
Expected volatility rate | 60.00% | 52.00% | ||
Expected volatility rate, minimum | 60.00% | 51.00% | ||
Expected volatility, maximum | 65.00% | 52.00% | ||
Risk-free interest rate | 1.61% | 2.98% | ||
Risk -free interest rate, minimum | 1.61% | 2.98% | ||
Risk-free interest rate, maximum | 2.01% | 3.42% | ||
Suboptimal exercise factor, minimum | 2.27 | 2.26 | 2.26 | 2.17 |
Suboptimal exercise factor, maximum | 3.64 | 3.63 | 3.65 | 3.63 |
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- Definition
The maximum factor at which the company expects the share price to be compared to the share option exercise price when the employee exercises. No definition available.
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- Definition
The minimum factor at which the company expects the share price to be compared to the share option exercise price when the employee exercises. No definition available.
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- Definition
The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. No definition available.
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X | ||||||||||
- Definition
The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. No definition available.
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X | ||||||||||
- Definition
The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The maximum risk-free interest rate assumption that is used in valuing an option on its own shares. No definition available.
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X | ||||||||||
- Definition
The minimum risk-free interest rate assumption that is used in valuing an option on its own shares. No definition available.
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- Details
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