Quarterly report pursuant to Section 13 or 15(d)

Warrants (Summary Of Changes In Warrants Outstanding During The Period) (Details)

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Warrants (Summary Of Changes In Warrants Outstanding During The Period) (Details)
9 Months Ended
Sep. 30, 2020
$ / shares
shares
Class of Warrant or Right [Line Items]  
Number of warrants, Outstanding 1,921,489
Number of warrants, Exchanged (995,757)
Number of warrants, Outstanding 925,732
Weigted average exercise price, Outstanding | $ / shares $ 22.10
Weighted average exercise price, Exchanged | $ / shares (22.64)
Weigted average exercise price, Outstanding | $ / shares $ 21.52
Liability-Classified Warrants [Member]  
Class of Warrant or Right [Line Items]  
Number of warrants, Outstanding 515,984
Number of warrants, Exchanged (238,072)
Number of warrants, Outstanding 277,912
Equity-Classified Warrants [Member]  
Class of Warrant or Right [Line Items]  
Number of warrants, Outstanding 1,405,505
Number of warrants, Exchanged (757,685)
Number of warrants, Outstanding 647,820