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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Revenues:        
Total revenues
Operating expenses:        
Research and development 1,163 1,153 2,270 2,165
General and administrative 1,309 1,184 2,626 2,376
Total operating expenses 2,472 2,337 4,896 4,541
Operating loss (2,472) (2,337) (4,896) (4,541)
Other income (expense):        
Foreign exchange gains (losses) (2) 21 67 36
Interest income 4 56 32 135
Other income, net 18 170 835 170
Total other income, net 20 247 934 341
Loss before taxes (2,452) (2,090) (3,962) (4,200)
Income tax benefit 286 307 576 575
Net loss (2,166) (1,783) (3,386) (3,625)
Dividend on convertible exchangeable preferred shares (50) (50) (101) (101)
Net loss applicable to common shareholders $ (2,216) $ (1,833) $ (3,487) $ (3,726)
Basic and diluted earnings per common share:        
Net loss per share - basic and diluted (in dollars per share) $ (0.58) $ (2.13) $ (1.48) $ (4.83)
Weighted average common shares outstanding - basic and diluted (in shares) 3,850,228 859,998 2,355,113 771,448