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CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Revenues:    
Total revenues $ 0 $ 0
Operating expenses:    
Research and development 798 1,312
General and administrative 1,364 1,381
Total operating expenses 2,162 2,693
Operating loss (2,162) (2,693)
Other income (expense):    
Foreign exchange (losses) (4) (59)
Interest income 69 12
Other income, net 566 879
Total other income, net 631 832
Loss before taxes (1,531) (1,861)
Income tax benefit 182 306
Net loss (1,349) (1,555)
Dividend on convertible exchangeable preferred shares (50) (50)
Net loss applicable to common stockholders $ (1,399) $ (1,605)
Basic and diluted earnings per common share:    
Net loss per share - basic and diluted (in dollars per share) $ (0.12) $ (0.38)
Weighted average common shares outstanding (in shares) 11,997,447 4,271,324