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Stock Option Plans And Warrants (Schedule Of Weighted-Average Assumptions) (Detail) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2011
Sep. 30, 2011
Sep. 30, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
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 years 2 months 12 days 3 years 2 months 12 days