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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Revenues:        
Revenues $ 0 $ 0 $ 0 $ 0
Operating expenses:        
Research and development 4,217 1,075 10,884 3,344
General and administrative 1,781 1,497 5,520 4,124
Total operating expenses 5,998 2,572 16,404 7,468
Operating loss (5,998) (2,572) (16,404) (7,468)
Other income (expense):        
Foreign exchange gains (losses) 9 (25) 5 42
Interest income 4 4 12 36
Other income, net   56 144 891
Total other income, net 13 35 161 969
Loss before taxes (5,985) (2,537) (16,243) (6,499)
Income tax benefit 998 281 2,650 858
Net loss (4,987) (2,256) (13,593) (5,641)
Dividend on convertible exchangeable preferred shares (50) (50) (151) (151)
Net loss applicable to common shareholders $ (5,037) $ (2,306) $ (13,744) $ (5,792)
Basic and diluted earnings per common share:        
Net loss per share - basic and diluted $ (0.54) $ (0.47) $ (1.60) $ (1.81)
Weighted average common shares outstanding 9,368,056 4,863,984 8,575,379 3,197,508