Fair Value Measurement - Summary of Changes in Fair Value of Company's Level 3 Financial Liabilities (Details) - Level 3 - USD ($) $ in Thousands |
9 Months Ended | |
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Sep. 30, 2019 |
Sep. 30, 2018 |
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| Trade-In Guarantee | ||
| Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | ||
| Beginning Balance | $ 268 | $ 805 |
| Recognition of revenue | $ (268) | (268) |
| Change in fair value | 0 | |
| Ending Balance | 537 | |
| Warrant Liability | ||
| Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | ||
| Beginning Balance | 3,785 | |
| Exercise of warrants | (2,951) | |
| Recognition of revenue | 0 | |
| Change in fair value | 644 | |
| Ending Balance | $ 1,478 | |
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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 Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of sales 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://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of settlements 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://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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