Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation (Summary Of Share-Based Transactions ) (Details)

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Stock-Based Compensation (Summary Of Share-Based Transactions ) (Details) - Stock Option [Member] - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Number of Options, Oustanding 255,922  
Number of Options, Granted 52,465  
Number of Options, Expired (2,080)  
Number of Options, Cancelled (101,733)  
Number of Options, Oustanding 204,574 255,922
Weighted Average Exercise Price, Outstanding $ 41.88  
Weighted Average Exercise Price, Granted 6.41  
Weighted Average Exercise price, Expired 97.78  
Weighted Average Exercise Price, Cancelled 34.99  
Weighted Average Exercise Price, Outstanding $ 35.60 $ 41.88
Weighted Average Remaining Contractual Term, Outstanding 7 years 9 months 18 days 7 years 1 month 6 days
Number of Options, Exercisable 123,263  
Weighted Average Exercise Price, Exercisable $ 51.15  
Weighted Average Remaining Contractual Term, Exercisable 6 years 2 months 12 days