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Note A - Organization and Business (Details Textual) - Jul. 31, 2015	Total
Number of Operating Subsidiaries	2
Number of Stores	142

X

- Definition

Number of operating subsidiaries that the entity has.

+ References

No definition available.

+ Details

Name:	crmt_NumberOfOperatingSubsidiaries
Namespace Prefix:	crmt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the number of stores.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfStores
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant