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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Revenues:    
Revenues $ 0 $ 0
Operating expenses:    
Research and development 5,674 4,954
General and administrative 1,645 1,605
Total operating expenses 7,319 6,559
Operating loss (7,319) (6,559)
Other income (expense):    
Foreign exchange gains (losses) (87) 29
Interest income 116 4
Other income, net 166 1,280
Total other income, net 195 1,313
Loss before taxes (7,124) (5,246)
Income tax benefit 1,320 1,138
Net loss (5,804) (4,108)
Dividend on convertible exchangeable preferred shares (50) (50)
Net loss applicable to common shareholders $ (5,854) $ (4,158)
Basic and diluted earnings per common share:    
Net loss per share - basic $ (0.47) $ (0.42)
Net loss per share - diluted $ (0.47) $ (0.42)
Weighted average common shares outstanding basic 12,539,189 9,993,135
Weighted average common shares outstanding diluted 12,539,189 9,993,135