Stockholders' Equity - Reconciliation of Warrant Liability Measured at Fair Value (Detail) - USD ($) $ in Thousands |
6 Months Ended | |
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Jun. 30, 2018 |
Jun. 30, 2017 |
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| Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | ||
| Change in fair value during the six months ended June 30, 2018 | $ 912 | $ 3 |
| Basis of Fair Value Measurements, Level 3 | ||
| Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | ||
| Beginning Balance | 954 | |
| Change in fair value during the six months ended June 30, 2018 | (912) | |
| Ending Balance | $ 42 | |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. 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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- Details
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