Stockholders' Equity (Deficit) - Reconciliation of Warrant Liability Measured at Fair Value (Detail) - USD ($) $ in Thousands |
6 Months Ended | |
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Jun. 30, 2015 |
Jun. 30, 2014 |
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| Equity [Abstract] | ||
| Beginning Balance | $ 3,961 | |
| Initial fair value of common stock warrants related to February 2015 offering | 14,692 | |
| Change in common stock warrant value | 974 | $ (8,122) |
| Ending Balance | $ 19,627 | |
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- References No definition available.
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- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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 preferred stock and warrants for common stock issued. No definition available.
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