Quarterly report pursuant to Section 13 or 15(d)

Net Income (Loss) Per Common Share (Details)

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Net Income (Loss) Per Common Share (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Numerator:        
Net income (loss)-basic $ 17,001 $ (7,923) $ (98,532) $ (16,253)
Less: noncash income from change in fair value of common stock warrants (19,852)      
Net loss-diluted $ (2,851) $ (7,923) $ (98,532) $ (16,253)
Denominator:        
Weighted average common shares outstanding 54,549 48,805 52,435 42,659
Dilutive effect of warrants 8,945      
Weighted-average common shares outstanding and potential dilutive common shares diluted 63,494 48,805 52,435 42,659
Net income (loss) per share        
Basic $ 0.31 $ (0.16) $ (1.88) $ (0.38)
Diluted $ 0.04 $ (0.16) $ (1.88) $ (0.38)