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CONSOLIDATED STATEMENTS OF OPERATIONS (LOSS) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Revenues:    
Total revenues
Operating expenses:    
Research and development 4,759 4,658
General and administrative 5,877 5,024
Total operating expenses 10,636 9,682
Operating loss (10,636) (9,682)
Other income (expense):    
Foreign exchange gains (losses) 22 101
Interest income 42 224
Other income, net 891 231
Total other income, net 955 556
Loss before taxes (9,681) (9,126)
Income tax benefit 1,236 1,296
Net loss (8,445) (7,830)
Dividend on convertible exchangeable preferred shares (201) (201)
Beneficial conversion feature of Series B preferred stock (3,775)  
Net loss applicable to common shareholders $ (12,421) $ (8,031)
Basic and diluted earnings per common share:    
Net loss per share - basic and diluted (in dollars per share) $ (3.42) $ (9.84)
Weighted average common shares outstanding - basic and diluted (in shares) 3,633,385 816,080