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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