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CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Revenues:        
Grant revenue $ 462 $ 735 $ 1,270 $ 1,487
Collaboration and research and development revenue 253   253  
Total revenues 715 735 1,523 1,487
Operating expenses:        
Research and development 2,904 4,972 9,826 13,861
General and administrative 1,205 1,433 4,006 4,281
Total operating expenses 4,109 6,405 13,832 18,142
Operating loss (3,394) (5,670) (12,309) (16,655)
Other income (expense):        
Change in valuation of financial instruments associated with stock purchase agreement (27) (4) (51) (115)
Change in valuation of liabilities measured at fair value       20
Foreign exchange gains (losses) 219 10 (354) (23)
Interest income 2 3 5 5
Other income, net 13   95 26
Total other income (expense) 207 9 (305) (87)
Loss from continuing operations before taxes (3,187) (5,661) (12,614) (16,742)
Income tax benefit 478 750 1,646 2,135
Net loss from continuing operations (2,709) (4,911) (10,968) (14,607)
Discontinued operations:        
Income from discontinued operations   6   29
Income tax on discontinued operations   (2)   (10)
Net income from discontinued operations   4   19
Net loss (2,709) (4,907) (10,968) (14,588)
Dividend on convertible exchangeable preferred shares (50) (50) (150) (150)
Net loss applicable to common shareholders $ (2,759) $ (4,957) $ (11,118) $ (14,738)
Basic and diluted earnings per common share:        
Net loss per share, continuing operations - basic and diluted (in dollars per share) $ (0.08) $ (0.22) $ (0.35) $ (0.68)
Net income per share, discontinued operations - basic and diluted (in dollars per share) 0.00 0.00 0.00 0.00
Net loss per share - basic and diluted (in dollars per share) $ (0.08) $ (0.22) $ (0.35) $ (0.68)
Weighted average common shares outstanding (in shares) 34,675,569 22,676,475 31,741,910 21,607,888