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Additional Paid-In Capital (Summary Of Option Activity) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Additional Paid-In Capital [Abstract]      
Number of options, Outstanding 3,102,500 3,195,000 2,588,661
Granted, Number of options (in shares) 600,000 1,246,000  
Number of options, Exercised (in shares) (32,500) (354,984)  
Number of options, Expired or Forfeited (in shares) (660,000) (199,177)  
Number of options, Exercisable (in shares) 2,802,500    
Number of options, Cancelled (in shares)   (85,500)  
Weighted average exercise price per share, Outstanding (in dollars per share) $ 2.80 $ 3.27 $ 3.55
Weighted average exercise price per option, Granted (in dollars per share) $ 2.97 $ 3.04  
Weighted average exercise price per option, Exercised (in dollars per share) $ 2.90 $ 2.48  
Weighted average exercise price per option, Expired for forfeited (in dollars per share) $ 5.19 $ 6.90  
Weighted average exercise price per share, Exercisable (in dollars per share) $ 2.79    
Weighted average exercise price per share, cancelled (in dollars per share)   3.44  
Weighted average remaining contractual term, Outstanding 2 years 8 months 2 years 9 months 2 years 11 months
Weighted average remaining contractual term, Exercisable 2 years 6 months    
Aggregate intrinsic value, Outstanding $ 637 $ 1,039 $ 463
Aggregate intrinsic value, Exercisable $ 626