Stock Option Plans And Warrants (Schedule Of Weighted-Average Assumptions) (Details) (USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2011	Sep. 30, 2010
Stock Option Plans And Warrants [Abstract]
Fair Value		$ 7.60	$ 12.57
Dividend Yield	0.00%	0.00%	0.00%
Expected Volatility		66.10%	68.20%
Weighted Average Volatility		66.10%	68.20%
Risk Free Interest Rate		0.30%
Minimum Risk Free Interest Rate			0.30%
Maximum Risk Free Interest Rate			0.50%
Expected Life of Options from Grant		3.2	3.2

Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Maximum Risk Free Interest Rate

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Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Minimum Risk Free Interest Rate

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Stock Option Plans and Warrants [Abstract]

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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.

+ References

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-Publisher FASB

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-Number 123R

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The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Subsection 2

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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.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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The range of expected volatilities used and the weighted-average expected volatility for an entity using a valuation technique with different volatilities during the contractual term.

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