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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Revenues:        
Grant revenue $ 735 $ 309 $ 1,487 $ 785
Total revenues 735 309 1,487 785
Operating expenses:        
Research and development 4,972 4,575 13,861 8,786
General and administrative 1,433 1,529 4,281 5,999
Total operating expenses 6,405 6,104 18,142 14,785
Operating loss (5,670) (5,795) (16,655) (14,000)
Other income (expense):        
Change in valuation of financial instruments associated with stock purchase agreement (4)   (115)  
Change in valuation of Economic Rights       570
Change in valuation of liabilities measured at fair value     20  
Foreign exchange gains (losses) 10 25 (23) 44
Interest income 3 8 5 12
Other income, net   16 26 5,520
Total other income (expense) 9 49 (87) 6,146
Loss from continuing operations before taxes (5,661) (5,746) (16,742) (7,854)
Income tax benefit 750 730 2,135 1,218
Net loss from continuing operations (4,911) (5,016) (14,607) (6,636)
Discontinued operations:        
Income from discontinued operations 6 20 29 70
Income tax on discontinued operations (2) (8) (10) (28)
Net income from discontinued operations 4 12 19 42
Net loss (4,907) (5,004) (14,588) (6,594)
Deemed dividend on convertible exchangeable preferred shares   (661)   (9,027)
Dividend on convertible exchangeable preferred shares (50) (63) (150) (248)
Net loss applicable to common shareholders $ (4,957) $ (5,728) $ (14,738) $ (15,869)
Basic and diluted earnings per common share:        
Net loss per share, continuing operations $ (0.22) $ (0.32) $ (0.68) $ (1.15)
Net income per share, discontinued operations $ 0 $ 0 $ 0 $ 0
Net loss per share applicable to common shareholders $ (0.22) $ (0.32) $ (0.68) $ (1.15)
Weighted average shares of common stock outstanding 22,676,475 17,788,568 21,607,888 13,850,792