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CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Revenues:        
Grant revenue $ 296 $ 356 $ 808 $ 752
Total revenues 296 356 808 752
Operating expenses:        
Research and development 2,580 4,545 6,922 8,889
General and administrative 1,333 1,386 2,801 2,848
Total operating expenses 3,913 5,931 9,723 11,737
Operating loss (3,617) (5,575) (8,915) (10,985)
Other income (expense):        
Change in valuation of financial instruments associated with stock purchase agreement (4) (64) (24) (111)
Change in valuation of liabilities measured at fair value   20   20
Foreign exchange losses (195) (43) (573) (33)
Interest income 2 1 3 2
Other income, net 62 26 82 26
Total other expense (135) (60) (512) (96)
Loss from continuing operations before taxes (3,752) (5,635) (9,427) (11,081)
Income tax benefit 405 816 1,168 1,385
Net loss from continuing operations (3,347) (4,819) (8,259) (9,696)
Discontinued operations:        
Income from discontinued operations   10   23
Income tax on discontinued operations   (3)   (8)
Net income from discontinued operations   7   15
Net loss (3,347) (4,812) (8,259) (9,681)
Dividend on convertible exchangeable preferred shares (50) (50) (100) (100)
Net loss applicable to common shareholders $ (3,397) $ (4,862) $ (8,359) $ (9,781)
Basic and diluted earnings per common share:        
Net loss per share, continuing operations - basic and diluted (in dollars per share) $ (0.1) $ (0.22) $ (0.28) $ (0.47)
Net income per share, discontinued operations - basic and diluted (in dollars per share) 0 0 0 0
Net loss per share - basic and diluted (in dollars per share) $ (0.1) $ (0.22) $ (0.28) $ (0.46)
Weighted average common shares outstanding (in shares) 34,388,486 22,582,283 30,250,769 21,064,739