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Significant Accounting Policies - Schedule of Capitalized Costs in the Consolidated Balance Sheets (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Accounting Policies [Abstract] |  |
Prepaid expenses | $ 2,478 | $ 2,327
Investments and other assets, net | $ 4,731 | $ 6,178

X
- Definition Capitalized costs in investments and other assets. + References No definition available. + Details
Name: | cars_CapitalizedCostsInInvestmentsAndOtherAssets
Namespace Prefix: | cars_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Capitalized costs in prepaid expenses. + References No definition available. + Details
Name: | cars_CapitalizedCostsInPrepaidExpenses
Namespace Prefix: | cars_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration