Annual report pursuant to Section 13 and 15(d)

Income Tax (Details Textual)

v2.4.0.6
Income Tax (Details Textual) (USD $)
Share data in Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax [Line Items]      
Income tax rate assumed for both State and Foreign deferred tax calculations 34.00% 34.00% 34.00%
Future enacted income tax rate assumed for both State and Foreign deferred tax calculations 34.00% 34.00% 34.00%
Number of anti-dilutive securities 2.6 2.4 2.3
Income Tax (Textual) [Abstract]      
Non capital loss for Income Tax carryforward $ 58,338,000 $ 41,100,000  
Net Operating Loss Carry Forwards 141,517,000 133,100,000  
Unclaimed tax deductions 12,900,000    
Starting range of research and development tax credits expiration period 2013    
Ending range of research and development tax credits expiration period 2028    
Percentage of likelihood for recognition of uncertain tax position 50.00%    
Deferred tax assets recognized 0 0  
Unrecognized Tax Benefits 2,000,000    
Accrued Interest and Penalties Related to Income Taxes 0 0  
Warrants [Member]
      
Income Tax [Line Items]      
Number of anti-dilutive securities     2.3
Options [Member]
      
Income Tax [Line Items]      
Number of anti-dilutive securities 2.6    
Restricted stock units [Member]
      
Income Tax [Line Items]      
Number of anti-dilutive securities   2.4  
Investment Tax Credit Carryforward [Member]
      
Income Tax [Line Items]      
Investment Tax Credits 1,981,000 1,300,000  
Research [Member]
      
Income Tax [Line Items]      
Investment Tax Credits $ 1,700,000    
Canada [Member]
      
Income Tax [Line Items]      
Income tax rate assumed for both State and Foreign deferred tax calculations 25.00% 26.50% 28.50%
Future enacted income tax rate assumed for both State and Foreign deferred tax calculations 25.00% 25.00% 25.00%