Registration of securities issued in business combination transactions

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

v3.20.2
Stock-Based Compensation (Summary Of Share-Based Transactions ) (Details) - $ / shares
6 Months Ended 12 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Dec. 31, 2018
Number of Options, Oustanding 204,574    
Number of Options, Expired (2,996)    
Number of Options, Cancelled (55,354)    
Number of Options, Oustanding 146,224 204,574  
Weighted Average Exercise Price, Outstanding $ 35.60    
Weighted Average Exercise Price, Expired 156.41    
Weighted Average Exercise Price, Cancelled 59.54    
Weighted Average Exercise Price, Outstanding $ 24.06 $ 35.60  
Weighted Average Remaining Contractual Term, Outstanding 7 years 7 months 6 days 7 years 3 months 18 days  
Number of Options, Exercisable 98,834    
Weighted Average Exercise Price, Exercisable $ 28.65    
Weighted Average Remaining Contractual Term, Exercisable 7 years 3 months 18 days    
Stock Option [Member]      
Number of Options, Oustanding 204,574 255,922  
Number of Options, Granted   52,465  
Number of Options, Expired   (2,080)  
Number of Options, Cancelled   (101,733)  
Number of Options, Oustanding 146,224 204,574 255,922
Weighted Average Exercise Price, Outstanding $ 35.60 $ 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 3 months 18 days 7 years 9 months 18 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