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Stock Option Plans And Warrants (Schedule Of Weighted-Average Assumptions) (Detail) (USD $)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Fair Value $ 7.60 $ 12.57
Dividend yield 0.00% 0.00%
Expected Volatility 66.10% 68.20%
Weighted Average Volatility 66.10% 68.20%
Risk Free Interest Rate 3.00%  
Minimum Risk Free Interest Rate   3.00%
Maximum Risk Free Interest Rate   5.00%
Expected Life of Options from Grant 3 years 2 months 12 days 3 years 2 months 12 days