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Condensed Consolidated Statement of Changes In Deficit (USD $)
In Thousands, except Share data
Total
Common Shares
Additional Paid- in Capital
Treasury Shares
Accumulated Deficit
Beginning Balance at Dec. 31, 2013 $ (33,856) $ 141,477 $ 738,754 $ (217) $ (913,870)
Beginning Balance (in shares) at Dec. 31, 2013   172,691,063      
Exercise of stock options (in shares) 234,500 234,500      
Exercise of stock options 307 193 114    
Exercise of warrants (in shares) 1,684,888 1,684,888      
Exercise of warrants 1,651 1,443 208    
Reacquisition of conversion option in convertible notes (10,100)   (10,100)    
Tax benefits realized from stock-based compensation 1   1    
Stock-based compensation 6,272   6,272    
Refund of equity issuance costs 3,191   3,191    
Loss for the period (36,707)       (36,707)
Ending Balance at Sep. 30, 2014 $ (69,241) $ 143,113 $ 738,440 $ (217) $ (950,577)
Ending Balance (in shares) at Sep. 30, 2014   174,610,451