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Note F - Debt Facilities (Details Textual)	Oct. 31, 2023
Notes Payable [Member]
Minimum Percent of Pool Balance	2.00%

X

- Definition

Minimum percent of pool balance.

+ References

No definition available.

+ Details

Name:	crmt_MinimumPercentOfPoolBalance
Namespace Prefix:	crmt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=crmt_NotesPayableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: