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Stock-Based Compensation (Schedule Of Stock Option Activity) (Details) - $ / shares
9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Stock-Based Compensation [Abstract]    
Outstanding, Shares 10,000  
Outstanding, Weighted Average Exercise Price $ 16.95  
Outstanding, Weighted Average Remaining Contractual Term   2 months 12 days
Expired, Shares (10,000)  
Expired, Weighted Average Exercise Price $ 16.95  
Outstanding, Shares 10,000
Outstanding, Weighted Average Exercise Price $ 16.95
Outstanding, Weighted Average Remaining Contractual Term   2 months 12 days
Exercisable, Shares  
Exercisable, Weighted Average Exercise Price