Commitments and Contingencies - Schedule of Future Minimum Sublease Income Payments (Details) $ in Thousands	Mar. 31, 2023 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Remainder of 2023	$ 1,670
2024	1,951
2025	1,023
Total	$ 4,644

Future minimum sublease income payments due in next twelve months.

No definition available.

Name:	carg_FutureMinimumSubleaseIncomePaymentsDueInNextTwelveMonths
Namespace Prefix:	carg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant