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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Revenues:        
Total revenues
Operating expenses:        
Research and development 1,075 1,063 3,344 3,227
General and administrative 1,497 1,285 4,124 3,661
Total operating expenses 2,572 2,348 7,468 6,888
Operating loss (2,572) (2,348) (7,468) (6,888)
Other income (expense):        
Foreign exchange gains (losses) (25) 79 42 115
Interest income 4 42 36 177
Other income, net 56 53 891 223
Total other income, net 35 174 969 515
Loss before taxes (2,537) (2,174) (6,499) (6,373)
Income tax benefit 281 273 858 848
Net loss (2,256) (1,901) (5,641) (5,525)
Dividend on convertible exchangeable preferred shares (50) (50) (151) (151)
Net loss applicable to common shareholders $ (2,306) $ (1,951) $ (5,792) $ (5,676)
Basic and diluted earnings per common share:        
Net loss per share - basic and diluted (in dollars per share) $ (0.47) $ (2.27) $ (1.81) $ (7.08)
Weighted average common shares outstanding - basic and diluted (in shares) 4,863,984 859,998 3,197,508 801,282