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Significant Accounting Policies - Schedule of Components of Cloud Computing Arrangements Net (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
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Accounting Policies [Abstract] |  |
Cloud computing arrangements, gross | $ 12,647 | $ 11,681
Less: Accumulated amortization | (5,438) | (3,177)
Cloud computing arrangements, net | $ 7,209 | $ 8,504

X
- Definition Cloud computing arrangements, accumulated amortization. + References No definition available. + Details
Name: | cars_CloudComputingArrangementsAccumulatedAmortization
Namespace Prefix: | cars_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cloud computing arrangements, gross. + References No definition available. + Details
Name: | cars_CloudComputingArrangementsGross
Namespace Prefix: | cars_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cloud computing arrangements, net. + References No definition available. + Details
Name: | cars_CloudComputingArrangementsNet
Namespace Prefix: | cars_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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