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Stockholders' Equity - Reconciliation of Warrant Liability Measured at Fair Value (Detail) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | |||
| Beginning Balance | $ 9,209 | $ 7,499 | |
| Exercise of common stock warrants during 2012 | (27,867) | ||
| Initial Fair Value of common stock warrants related March 2011 offering | 6,068 | ||
| Change in fair value of common stock warrants | 51,216 | (4,358) | (5,166) |
| Ending Balance | $ 32,558 | $ 9,209 | $ 7,499 |
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- Definition
Exercise of warrants liability measured at fair value. No definition available.
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- Definition
Fair value of Common Stock warrants issued. 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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