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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Revenues:    
Total revenues
Operating expenses:    
Research and development 1,106,000 1,012,000
General and administrative 1,318,000 1,192,000
Total operating expenses 2,424,000 2,204,000
Operating loss (2,424,000) (2,204,000)
Other income (expense):    
Foreign exchange gains (losses) 69,000 15,000
Interest income 28,000 79,000
Other income, net 817,000  
Total other income, net 914,000 94,000
Loss before taxes (1,510,000) (2,110,000)
Income tax benefit 290,000 268,000
Net loss (1,220,000) (1,842,000)
Dividend on convertible exchangeable preferred shares (50,000) (50,000)
Net loss applicable to common shareholders $ (1,270,000) $ (1,892,000)
Basic and diluted earnings per common share:    
Net loss per share - basic and diluted (in dollars per share) $ (1.48) $ (2.77)
Weighted average common shares outstanding - basic and diluted 859,998 681,910
Collaboration and research and development revenue [Member]    
Revenues:    
Total revenues