Quarterly report pursuant to Section 13 or 15(d)

Note 9 - Share Capital (Details Textual)

v3.20.2
Note 9 - Share Capital (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended 11 Months Ended 18 Months Ended
Aug. 10, 2020
Jun. 03, 2019
May 24, 2019
May 13, 2019
Jun. 08, 2018
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
May 07, 2019
Sep. 30, 2019
May 30, 2018
Mar. 27, 2018
Stock Issued During Period, Value, New Issues                 $ 19,594        
July 2020 Confidentially Marketed Public Offering [Member]                          
Stock Issued During Period, Shares, New Issues (in shares) 11,854,472                        
Shares Issued, Price Per Share (in dollars per share) $ 5.25                        
Proceeds from Issuance of Common Stock, Gross $ 62,236                        
Proceeds from Issuance of Common Stock, Net of Share Issuance Costs $ 58,234                        
Stock Issuance, Percent of Cash Commission to Broker 6.00%                        
June 2019 Public Offering [Member]                          
Stock Issued During Period, Shares, New Issues (in shares)   11,500,000                      
Shares Issued, Price Per Share (in dollars per share)   $ 1.85                      
Proceeds from Issuance of Common Stock, Gross   $ 21,275                      
Proceeds from Issuance of Common Stock, Net of Share Issuance Costs   $ 19,594                      
Stock Issuance, Percent of Cash Commission to Broker   7.00%                      
The 2019 Share Purchase Agreement [Member]                          
Stock Issued During Period, Shares, New Issues (in shares)       171,428                  
Stock Issuance Program, Authorized Amount                   $ 20,000      
Stock Issued During Period, Value, New Issues       $ 360         $ 360        
The 2018 Purchase Agreement [Member]                          
Stock Issued During Period, Shares, New Issues (in shares)     6,409,980   170,261       5,502,433        
Shares Issued, Price Per Share (in dollars per share)             $ 1.82   $ 1.82   $ 1.82    
Proceeds from Issuance of Common Stock, Gross                 $ 10,000 $ 11,900      
Stock Issuance Program, Authorized Amount                       $ 20,000  
Stock Issued During Period, Value, New Issues         $ 600       10,000        
Proceeds from Issuance of Common Stock           $ 10,000        
The 2018 ATM Offering [Member]                          
Stock Issued During Period, Shares, New Issues (in shares)                 77,349        
Shares Issued, Price Per Share (in dollars per share)             $ 2.37   $ 2.37   $ 2.37    
Proceeds from Issuance of Common Stock, Gross                 $ 183   $ 11,200    
Stock Issuance, Percent of Cash Commission to Broker             3.00%   3.00%   3.00%    
Stock Issuance Program, Authorized Amount                         $ 30,000
Stock Issued During Period, Value, New Issues                 $ 178        
Proceeds from Issuance of Common Stock           $ 178   $ 10,900