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Unaudited Condensed Consolidated Income Statements (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Income Statement [Abstract] |  |  |  |
Depreciation and amortization expense | $ 2,645 | $ 2,849 | $ 7,539 | $ 10,968
Impairment in cost of revenue | $ 0 | $ 9,750 | $ 2,919 | $ 9,930

X
- Definition Cost of goods and services sold depreciation amortization and impairment expense. + References No definition available. + Details
Name: | carg_CostOfGoodsAndServicesSoldDepreciationAmortizationAndImpairmentExpense
Namespace Prefix: | carg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Impairment in cost of revenue. + References No definition available. + Details
Name: | carg_ImpairmentInCostOfRevenue
Namespace Prefix: | carg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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