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Stockholders' Equity - Reconciliation of Warrant Liability Measured at Fair Value (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
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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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| Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||||
| Balance at December 31, 2011 | $ 9,209 | |||
| Change in fair value of common stock warrants during nine months ended September 30, 2012 | (2,967) | (3,659) | 85,572 | (1,538) |
| Exercise of warrants during nine months ended September 30, 2012 | (27,408) | |||
| Balance at September 30, 2012 | $ 67,373 | $ 67,373 | ||
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- Definition
Exercise of warrants liability measured at fair value. No definition available.
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- Details
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- Definition
Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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