Quarterly report pursuant to Section 13 or 15(d)

Warrants (Summary Of Warrants Outstanding) (Details)

v3.19.2
Warrants (Summary Of Warrants Outstanding) (Details) - $ / shares
 6 Months Ended
Jun. 30, 2019
Jan. 25, 2019
Dec. 31, 2018
Class of Warrant or Right [Line Items]      
Number of Warrants 1,921,489   1,065,286
Exercise Price   $ 9.60  
Liability-Classified Warrants [Member]      
Class of Warrant or Right [Line Items]      
Number of Warrants 515,984   555,667
Equity-Classified Warrants [Member]      
Class of Warrant or Right [Line Items]      
Number of Warrants 1,405,505   509,619
January 2014 Investor Warrants [Member] | Liability-Classified Warrants [Member]      
Class of Warrant or Right [Line Items]      
Number of Warrants     39,683
Exercise Price $ 153.60    
Expiration Date 2019-01    
November 2015 Investor Warrants [Member] | Liability-Classified Warrants [Member]      
Class of Warrant or Right [Line Items]      
Number of Warrants 104,168   104,168
Exercise Price $ 63.60    
Expiration Date 2021-05    
November 2015 Placement Agent Warrants [Member] | Liability-Classified Warrants [Member]      
Class of Warrant or Right [Line Items]      
Number of Warrants 279   279
Exercise Price $ 63.60    
Expiration Date 2020-11    
March 2016 Investor Warrants [Member] | Liability-Classified Warrants [Member]      
Class of Warrant or Right [Line Items]      
Number of Warrants 50,651   50,651
Exercise Price $ 50.40    
Expiration Date 2021-09    
September 2016 Investor Warrants [Member] | Liability-Classified Warrants [Member]      
Class of Warrant or Right [Line Items]      
Number of Warrants 67,084   67,084
Exercise Price $ 36.00    
Expiration Date 2022-03    
June 2017 Investor Warrants [Member] | Liability-Classified Warrants [Member]      
Class of Warrant or Right [Line Items]      
Number of Warrants 126,264   126,264
Exercise Price $ 48.00    
Expiration Date 2022-12    
June 2017 Placement Agent Warrants [Member] | Liability-Classified Warrants [Member]      
Class of Warrant or Right [Line Items]      
Number of Warrants 15,153   15,153
Exercise Price $ 49.50    
Expiration Date 2022-06    
October 2017 Investor Warrants [Member] | Liability-Classified Warrants [Member]      
Class of Warrant or Right [Line Items]      
Number of Warrants 136,058   136,058
Exercise Price $ 34.20    
Expiration Date 2023-04    
October 2017 Placement Agent Warrants [Member] | Liability-Classified Warrants [Member]      
Class of Warrant or Right [Line Items]      
Number of Warrants 16,327   16,327
Exercise Price $ 36.72    
Expiration Date 2022-10    
October 2018 Investor Warrants [Member] | Equity-Classified Warrants [Member]      
Class of Warrant or Right [Line Items]      
Number of Warrants 480,771   480,771
Exercise Price $ 20.04    
Expiration Date 2024-04    
October 2018 Placement Agent Warrants [Member] | Equity-Classified Warrants [Member]      
Class of Warrant or Right [Line Items]      
Number of Warrants 28,848   28,848
Exercise Price $ 19.50    
Expiration Date 2023-10    
January 2019 Investor Warrants [Member] | Equity-Classified Warrants [Member]      
Class of Warrant or Right [Line Items]      
Number of Warrants 895,886    
Exercise Price $ 9.60    
Expiration Date 2024-01