Annual report pursuant to Section 13 and 15(d)

Note 11 - Share Capital (Details Textual)

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Note 11 - Share Capital (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 14, 2021
Nov. 04, 2021
Aug. 10, 2020
Dec. 31, 2021
Dec. 31, 2020
May 05, 2020
Stock Issued During Period, Value, Licensing Fee       $ 7,500    
The 2020 ATM Offering [Member]            
Stock Issuance Program, Authorized Amount           $ 75,000
Stock Issued During Period, Shares, New Issues (in shares)       15,315    
Shares Issued, Price Per Share (in dollars per share)       $ 2.446    
Proceeds from Issuance of Common Stock, Gross       $ 37    
Proceeds from Issuance of Common Stock       $ 36 $ 0  
Stock Issuance, Percent of Cash Commission to Broker       3.00%    
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      
Stock Issuance, Percent of Cash Commission to Broker     6.00%      
Proceeds from Issuance of Common Stock, Net of Share Issuance Costs     $ 58,234      
HM43239 [Member]            
Stock Issued During Period, Shares, Licensing Fees (in shares) 3,235,548 3,235,548        
Stock Issued During Period, Value, Licensing Fee $ 7,500 $ 7,500