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Fair Value Measurements - Schedule of Financial Assets and Liabilities that are Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Financial assets: |  |
Finance receivables at fair value, excluding accrued interest and fees receivable | $ 450,059 | $ 441,496
Financial liabilities: |  |
Warrant liabilities | 1,050 | 1,888
Fair Value, Recurring | Reported Value Measurement |  |
Financial assets: |  |
Finance receivables at fair value, excluding accrued interest and fees receivable | 450,059 | 441,496
Fair Value, Recurring | Reported Value Measurement | Public Warrants |  |
Financial liabilities: |  |
Warrant liabilities | 594 | 1,189
Fair Value, Recurring | Reported Value Measurement | Private Placement Warrants |  |
Financial liabilities: |  |
Warrant liabilities | 456 | 699
Fair Value, Recurring | Fair Value Measurements | Level 1 |  |
Financial assets: |  |
Finance receivables at fair value, excluding accrued interest and fees receivable | 0 | 0
Fair Value, Recurring | Fair Value Measurements | Level 1 | Public Warrants |  |
Financial liabilities: |  |
Warrant liabilities | 594 | 1,189
Fair Value, Recurring | Fair Value Measurements | Level 1 | Private Placement Warrants |  |
Financial liabilities: |  |
Warrant liabilities | 0 | 0
Fair Value, Recurring | Fair Value Measurements | Level 2 |  |
Financial assets: |  |
Finance receivables at fair value, excluding accrued interest and fees receivable | 0 | 0
Fair Value, Recurring | Fair Value Measurements | Level 2 | Public Warrants |  |
Financial liabilities: |  |
Warrant liabilities | 0 | 0
Fair Value, Recurring | Fair Value Measurements | Level 2 | Private Placement Warrants |  |
Financial liabilities: |  |
Warrant liabilities | 0 | 0
Fair Value, Recurring | Fair Value Measurements | Level 3 |  |
Financial assets: |  |
Finance receivables at fair value, excluding accrued interest and fees receivable | 450,059 | 441,496
Fair Value, Recurring | Fair Value Measurements | Level 3 | Public Warrants |  |
Financial liabilities: |  |
Warrant liabilities | 0 | 0
Fair Value, Recurring | Fair Value Measurements | Level 3 | Private Placement Warrants |  |
Financial liabilities: |  |
Warrant liabilities | $ 456 | $ 699

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