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Shareholders' Equity (Summary Of Restricted Stock Activity) (Details) - Restricted Stock [Member] - $ / shares
9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Restricted Shares    
Restricted Shares, Non-vested restricted stock at beginning 149,824  
Restricted Shares, Vested (149,824)  
Restricted Shares, Non-vested restricted stock at ending 0 149,824
Weighted-Average Grant Date Fair Value    
Weighted-Average Grant Date Fair Value, Non-vested restricted stock at beginning $ 0.33  
Weighted-Average Grant Date Fair Value, Vested 0.33  
Weighted Average Grant Date Fair Value, Non-vested restricted stock at ending $ 0.33
Weighted-Average Contractual Life, Non-vested restricted stock   9 years 1 month 6 days