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Stock Option Plans And Warrants (Narrative) (Details) (USD $)
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2011
Sep. 30, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]   
Minimum range of exercise prices for outstanding options$ 2.00  
Maximum range of exercise prices for outstanding options$ 60.92  
Minimum range of exercise prices for options exercisable $ 2.00 
Maximum range of exercise prices for options exercisable $ 60.92 
Weighted average remaining contractual life of options outstanding (years)5.35.3 
Stock options minimum vesting period (years) 1 
Stock options maximum vesting period (years) 3 
Recognized compensation cost$ 2,000,000  
Deferred tax asset400,000400,000 
Total unrecognized compensation cost related to non-vested stock options2,000,0002,000,000 
Cash received from exercise of options 72,000 
Dividend Yield0.00%0.00%0.00%
Restricted Stock Units [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]   
Number of restricted stock units issued to employees, net of forfeitures 67,940 
Average price restricted stock units $ 10.63