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Note C - Finance Receivables, Net - Credit Quality Information for Finance Receivables (Details) - USD ($) $ in Thousands | Jan. 31, 2022 | Apr. 30, 2021 | Jan. 31, 2021
--- | --- | --- | ---
Principle Balance | $ 1,029,203 | $ 809,537 | $ 744,521
Percent of Portfolio | 100.00% | 100.00% | 100.00%
Financial Asset, Not Past Due [Member] |  |  |
Principle Balance | $ 841,635 | $ 717,520 | $ 655,445
Percent of Portfolio | 81.78% | 88.64% | 88.04%
Financial Asset, 3 to 29 Days Past Due [Member] |  |  |
Principle Balance | $ 146,609 | $ 71,269 | $ 68,414
Percent of Portfolio | 14.24% | 8.80% | 9.19%
Financial Asset, 30 to 59 Days Past Due [Member] |  |  |
Principle Balance | $ 29,062 | $ 13,058 | $ 14,147
Percent of Portfolio | 2.82% | 1.61% | 1.90%
Financial Asset, 60 to 89 Days Past Due [Member] |  |  |
Principle Balance | $ 6,682 | $ 5,551 | $ 4,163
Percent of Portfolio | 0.65% | 0.69% | 0.56%
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |
Principle Balance | $ 5,215 | $ 2,139 | $ 2,352
Percent of Portfolio | 0.51% | 0.26% | 0.32%

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