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Consolidated Statements of Stockholders' Deficit (USD $)
In Thousands, except Share data
Total
January Two Thousand And Eleven
July Two Thousand And Thirteen
Common Shares
Common Shares
January Two Thousand And Eleven
Common Shares
July Two Thousand And Thirteen
Additional Paid-in Capital
Additional Paid-in Capital
January Two Thousand And Eleven
Additional Paid-in Capital
July Two Thousand And Thirteen
Treasury Stock
Accumulated Deficit
Beginning Balance at Dec. 31, 2010 $ (202,367)     $ 90,465     $ 206,718     $ (217) $ (499,333)
Beginning Balance (in shares) at Dec. 31, 2010       106,856,731              
Exercise of warrants (in shares)       12,888,369              
Exercise of warrants 18,702     10,289     8,413        
Exercise of stock options (in shares)       2,273,221              
Exercise of stock options 5,094     1,833     3,261        
Stock issued in financing (in shares)         13,800,000            
Stock issued in financing   98,654     10,723     87,931      
Tax benefits (provisions) from stock-based compensation 4,199           4,199        
Transfer of fair value of warrants exercised from liabilities to equity 129,517           129,517        
Share issuances for services (in shares)       14,221              
Share issuances for services 71     11     60        
Stock-based compensation 9,294           9,294        
Net loss (69,126)                   (69,126)
Ending Balance at Dec. 31, 2011 (5,962)     113,321     449,393     (217) (568,459)
Ending Balance (in shares) at Dec. 31, 2011       135,832,542              
Exercise of warrants (in shares) 11,047,579     11,047,579              
Exercise of warrants 16,720     8,540     8,180        
Exercise of stock options (in shares) 3,380,413     3,380,413              
Exercise of stock options 8,205     2,659     5,546        
Vesting of restricted stock units (in shares)       97,398              
Vesting of restricted stock units       76     (76)        
Conversion option contained in exchangeable notes 22,898           22,898        
Tax benefits (provisions) from stock-based compensation 11,334           11,334        
Transfer of fair value of warrants exercised from liabilities to equity 103,885           103,885        
Share issuances for services (in shares)       3,001              
Share issuances for services 32     1     31        
Stock-based compensation 18,075           18,075        
Net loss (179,184)                   (179,184)
Ending Balance at Dec. 31, 2012 (3,997)     124,597     619,266     (217) (747,643)
Ending Balance (in shares) at Dec. 31, 2012       150,360,933              
Exercise of warrants (in shares) 147,050     147,050              
Exercise of warrants 160     113     47        
Exercise of stock options (in shares) 386,000     386,000              
Exercise of stock options 627     292     335        
Stock issued in financing (in shares)           21,700,000          
Stock issued in financing     121,206     16,401     104,805    
Vesting of restricted stock units (in shares)       93,048              
Vesting of restricted stock units       71     (71)        
Tax benefits (provisions) from stock-based compensation (361)           (361)        
Transfer of fair value of warrants exercised from liabilities to equity 24           24        
Share issuances for services (in shares)       4,032              
Share issuances for services 27     3     24        
Stock-based compensation 14,685           14,685        
Net loss (166,227)                   (166,227)
Ending Balance at Dec. 31, 2013 $ (33,856)     $ 141,477     $ 738,754     $ (217) $ (913,870)
Ending Balance (in shares) at Dec. 31, 2013       172,691,063