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v3.22.2.2

Note C - Finance Receivables, Net (Details Textual) | 6 Months Ended
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Oct. 31, 2022 USD ($) | Oct. 31, 2021 USD ($)
Finance Receivables, Number of Loan Classes | 1 |
Finance Receivables, Number of Risk Pools | 1 |
Financing Receivable, Allowance for Credit Loss, Recovery | $ 1,200,000 | $ 1,100,000
Net Charge Offs as Percentage of Average Finance Receivables | 11.00% | 8.40%
Collections as Percentage of Average Financing Receivables | 17.40% | 21.90%
Delinquencies Greater Than 30 Days as Percentage of Average Financing Receivables | 3.60% | 4.00%
Increase (Decrease) in Average Selling Price | $ 2,478 |
Increase (Decrease) in Average Selling Price, Percentage | 15.90% |
Maximum [Member] |  |
Financing Receivable Interest Rate | 16.50% |
Financing Receivable Payment Period (Month) | 54 months |
Maximum [Member] | ILLINOIS |  |
Financing Receivable Interest Rate | 21.50% |
Minimum [Member] |  |
Financing Receivable Payment Period (Month) | 18 months |
Minimum [Member] | ILLINOIS |  |
Financing Receivable Interest Rate | 19.50% |

X
- Definition Represents the percentage of average financing receivables collected during the reported period. + References No definition available. + Details
Name: | crmt_CollectionsAsPercentageOfAverageFinancingReceivables
Namespace Prefix: | crmt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Delinquencies greater than 30 days as a percentage of average finance receivables. + References No definition available. + Details
Name: | crmt_DelinquenciesGreaterThan30DaysAsPercentageOfAverageFinancingReceivables
Namespace Prefix: | crmt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of loan classes of finance receivables. + References No definition available. + Details
Name: | crmt_FinanceReceivablesNumberOfLoanClasses
Namespace Prefix: | crmt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of risk pools of finance receivables. + References No definition available. + Details
Name: | crmt_FinanceReceivablesNumberOfRiskPools
Namespace Prefix: | crmt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the interest rate on installment sale contracts. + References No definition available. + Details
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Namespace Prefix: | crmt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the payment period on installment sale contracts from the sale of used vehicles. + References No definition available. + Details
Name: | crmt_FinancingReceivablePaymentPeriod
Namespace Prefix: | crmt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of increase (decrease) in average selling price during period. + References No definition available. + Details
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Namespace Prefix: | crmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The percentage of increase(decrease) in average selling price. + References No definition available. + Details
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Namespace Prefix: | crmt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage of average finance receivables charged off. + References No definition available. + Details
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Namespace Prefix: | crmt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase in allowance for credit loss on financing receivable from recovery. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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Namespace Prefix: |
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- Details
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Period Type: |

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- Details
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Namespace Prefix: |
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