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Taxes (Details) (USD $)
 3 Months Ended 9 Months Ended 12 Months Ended 185 Months Ended 194 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2011
Sep. 30, 2012
Net loss from continuing operations before taxes:                  
Domestic         $ 904,000 $ (3,533,000) $ (1,464,000)    
Foreign         (16,072,000) (12,014,000) (17,505,000)    
Loss from continuing operations before taxes (3,572,000) (3,403,000) (10,040,000) (11,524,000) (15,168,000) (15,547,000) (18,969,000) (259,277,000) (269,317,000)
Loss from discontinued operations before taxes:                  
Domestic         (640,000) (1,131,000) (1,549,000)    
Loss from discontinued operations before taxes         (640,000) (1,131,000) (1,549,000)    
Total loss before taxes:                  
Domestic         264,000 (4,664,000) (3,013,000)    
Foreign         (16,072,000) (12,014,000) (17,505,000)    
Loss before taxes         (15,808,000) (16,678,000) (20,518,000)    
Benefit for income taxes                  
Current - domestic           (10,000) (12,000)    
Current - foreign         565,000 667,000 960,000    
Current - total 419,000 126,000 714,000 443,000 565,000 657,000 948,000 18,444,000 19,158,000
Research and development | U.K
                  
Taxes                  
Income tax credits         $ 600,000 $ 700,000 $ 900,000 $ 600,000