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Note C - Finance Receivables, Net - Credit Quality Information for Finance Receivables (Details) - USD ($) $ in Thousands | Oct. 31, 2022 | Jul. 31, 2022 | Apr. 30, 2022 | Oct. 31, 2021 | Jul. 31, 2021
--- | --- | --- | --- | --- | ---
Principle Balance | $ 1,259,649 | $ 1,259,649 | $ 1,101,497 | $ 966,425 | $ 966,425
Percent of Portfolio | 100.00% | 100.00% | 100.00% | 100.00% | 100.00%
Financial Asset, Not Past Due [Member] |  |  |  |  |
Principle Balance |  | $ 1,028,291 | $ 958,808 |  | $ 819,314
Percent of Portfolio |  | 81.63% | 87.05% |  | 84.78%
Financial Asset, 3 to 29 Days Past Due [Member] |  |  |  |  |
Principle Balance |  | $ 185,434 | $ 109,873 |  | $ 108,563
Percent of Portfolio |  | 14.72% | 9.97% |  | 11.23%
Financial Asset, 30 to 59 Days Past Due [Member] |  |  |  |  |
Principle Balance |  | $ 35,258 | $ 22,477 |  | $ 24,499
Percent of Portfolio |  | 2.80% | 2.04% |  | 2.53%
Financial Asset, 60 to 89 Days Past Due [Member] |  |  |  |  |
Principle Balance |  | $ 7,151 | $ 7,360 |  | $ 7,509
Percent of Portfolio |  | 0.57% | 0.67% |  | 0.78%
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |  |
Principle Balance |  | $ 3,515 | $ 2,979 |  | $ 6,540
Percent of Portfolio |  | 0.28% | 0.27% |  | 0.68%

X
- Definition The principal balance of finance receivables after deducting unearned finance charges from gross contract amount. + References No definition available. + Details
Name: | crmt_FinanceReceivablePrincipalBalance
Namespace Prefix: | crmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Represents percent of portfolio for financing receivable. + References No definition available. + Details
Name: | crmt_FinancingReceivablePercentOfPortfolio
Namespace Prefix: | crmt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
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