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Summary of Significant Accounting Policies (Schedule Of Summary Of Assumptions Used) (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Dividend yield	0.00%	0.00%
Expected volatility		49.11%
Risk-free interest rate		2.84%
Expected life	7 years	7 years
Maximum [Member]
Expected volatility	54.21%
Risk-free interest rate	1.61%
Minimum [Member]
Expected volatility	53.12%
Risk-free interest rate	1.01%

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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