| 
           Net Loss Per Share Attributable to Common Stockholders - Schedule of Earnings per Share, Basic and Diluted (Details) (USD $) 
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        3 Months Ended | 9 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 
           Sep. 30, 2012 
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           Sep. 30, 2011 
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           Sep. 30, 2012 
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           Sep. 30, 2011 
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| Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] | ||||||||||||
| Basic | 208,712,000 | 80,473,000 | 170,414,000 | 72,739,000 | ||||||||
| Diluted | 208,712,000 | 80,473,000 | 170,414,000 | 72,739,000 | ||||||||
| Net loss per share attributable to common stockholders - basic and diluted | $ (0.52) | $ (0.67) | $ (1.40) | $ (1.94) | ||||||||
| 
           Stock Options [Member] 
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| Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] | ||||||||||||
| Dilutive common stock options | 0 | [1] | 0 | [1] | 0 | 0 | ||||||
| 
           2008 Loans [Member] 
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| Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] | ||||||||||||
| Dilutive debt securities | 0 | [2] | 0 | [2] | 0 | 0 | ||||||
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           Convertible Senior Unsecured Notes [Member] 
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| Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] | ||||||||||||
| Dilutive debt securities | 0 | [3] | 0 | [3] | 0 | 0 | ||||||
          
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