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Stockholders' Equity (Deficit) - Reconciliation of Warrant Liability Measured at Fair Value (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | |
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Mar. 31, 2015
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Mar. 31, 2014
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| Equity [Abstract] | ||
| Beginning Balance | $ 3,961us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue | |
| Initial fair value of common stock warrants related to February 2015 offering | 14,692us-gaap_StockAndWarrantsIssuedDuringPeriodValuePreferredStockAndWarrants | |
| Change in common stock warrant value | 1,532us-gaap_GainLossOnDerivativeInstrumentsNetPretax | (1,457)us-gaap_GainLossOnDerivativeInstrumentsNetPretax |
| Ending Balance | $ 20,185us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue | |
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- Details
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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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