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Note C - Finance Receivables, Net - Credit Quality Information for Finance Receivables (Details) - USD ($) $ in Thousands | Jul. 31, 2022 | Apr. 30, 2022 | Jul. 31, 2021
--- | --- | --- | ---
Principle Balance | $ 1,185,276 | $ 1,101,497 | $ 890,467
Percent of Portfolio | 100.00% | 100.00% | 100.00%
Financial Asset, Not Past Due [Member] |  |  |
Principle Balance | $ 990,391 | $ 958,808 | $ 767,375
Percent of Portfolio | 83.56% | 87.05% | 86.18%
Financial Asset, 3 to 29 Days Past Due [Member] |  |  |
Principle Balance | $ 151,953 | $ 109,873 | $ 93,712
Percent of Portfolio | 12.82% | 9.97% | 10.53%
Financial Asset, 30 to 59 Days Past Due [Member] |  |  |
Principle Balance | $ 33,576 | $ 22,477 | $ 19,328
Percent of Portfolio | 2.83% | 2.04% | 2.17%
Financial Asset, 60 to 89 Days Past Due [Member] |  |  |
Principle Balance | $ 6,675 | $ 7,360 | $ 6,096
Percent of Portfolio | 0.56% | 0.67% | 0.68%
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |
Principle Balance | $ 2,681 | $ 2,979 | $ 3,956
Percent of Portfolio | 0.23% | 0.27% | 0.44%

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
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetNotPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=crmt_FinancialAsset3To29DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables30To59DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables60To89DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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