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Impairments - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2025 | Jun. 30, 2025 | Sep. 30, 2024 | Jun. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Goodwill [Line Items] |  |  |  |  |  |  |
Capitalized hosting arrangements |  |  | $ 974 |  | $ 291 | $ 974 |
Capitalized internal-use software |  |  |  |  | 769 |  |
Capitalized website development assets |  |  | 5,833 |  | 1,882 | 5,833 |
Impairment of intangible asset | $ 0 |  | 0 |  | 6,624 | 7,538 | $ 7,538
Impairment of goodwill |  |  | 0 |  | 19,568 | 115,206 |
Amortization of intangible assets | 813 |  | $ 509 |  | 1,830 | 3,148 |
Accumulated impairment losses of goodwill | 134,774 |  |  |  | 134,774 |  | $ 115,206
Digital Wholesale |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |
Impairment of intangible asset |  |  |  |  | $ 6,624 | $ 7,538 |
Car Offer |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |
Non-cash impairment charge allocated to the right-of-use assets |  | $ 499 |  |  |  |  |
Capitalized hosting arrangements |  | 291 |  |  |  |  |
Capitalized internal-use software |  | 769 |  |  |  |  |
Capitalized website development assets |  | 4,801 |  |  |  |  |
Impairment of intangible asset |  | 6,624 |  |  |  |  |
Impairment of goodwill |  | 19,568 |  |  |  |  |
Goodwill fair value |  | 0 |  | $ 0 |  |  |
Car Offer | Digital Wholesale |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |
Non-cash impairment charge allocated to the right-of-use assets |  | 499 |  |  |  |  |
Capitalized hosting arrangements |  | 291 |  |  |  |  |
Capitalized internal-use software |  | 769 |  |  |  |  |
Wholesale cost of revenue impairment for capitalized website development |  | 2,919 |  |  |  |  |
Operating expense impairment for capitalized website development |  | 1,882 |  |  |  |  |
Impairment of intangible asset |  | 6,624 |  |  |  |  |
Goodwill impairment charge pre-tax impact |  | 19,568 |  | $ 19,568 |  |  |
Goodwill and other asset impairment | $ 0 | $ 32,552 |  |  |  |  |

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