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Note C - Finance Receivables, Net (Details Textual)	1 Months Ended	12 Months Ended
	Dec. 31, 2023	Apr. 30, 2024 USD ($)	Apr. 30, 2023 USD ($)	Apr. 30, 2022 USD ($)	Jan. 31, 2024	Sep. 30, 2023	Apr. 30, 2021
Financing Receivable Interest Rate	18.00%	18.25%
Finance Receivables, Number of Loan Classes		1
Finance Receivables, Number of Risk Pools		1
Financing Receivable, after Allowance for Credit Loss		$ 1,098,591,000	$ 1,063,460,000
Financing Receivable, Allowance for Credit Loss, Recovery		$ 2,800,000	$ 2,500,000	$ 2,400,000
Finance Receivables, Allowance, Percent of Principle Balance		25.32%	23.91%	23.57%	25.74%	26.04%	23.55%
Collections as Percentage of Average Financing Receivables		3.70%
Increase (Decrease) in Average Selling Price		$ 1,033
Increase (Decrease) in Average Selling Price, Percentage		5.70%
Automobile Loan [Member] | Asset Pledged as Collateral [Member] | Notes Payable [Member]
Financing Receivable, after Allowance for Credit Loss		$ 814,700,000	$ 721,900,000
ARKANSAS
Financing Receivable Interest Rate	16.75%
TENNESSEE
Financing Receivable Interest Rate		23.00%
Maximum [Member]
Financing Receivable Interest Rate		18.25%
Financing Receivable Payment Period		69 months
Maximum [Member] | ARKANSAS
Financing Receivable Interest Rate		16.75%
Maximum [Member] | ILLINOIS
Financing Receivable Interest Rate		21.50%
Minimum [Member]
Financing Receivable Payment Period		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.

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- Definition

The allowance for credit losses as a percentage of the principal balance related to financing receivables.

+ References

No definition available.

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- Definition

Number of loan classes of finance receivables.

+ References

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- Definition

Number of risk pools of finance receivables.

+ References

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- Definition

Represents the interest rate on installment sale contracts.

+ References

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- Definition

Represents the payment period on installment sale contracts from the sale of used vehicles.

+ References

No definition available.

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- Definition

The amount of increase (decrease) in average selling price during period.

+ References

No definition available.

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- Definition

The percentage of increase(decrease) in average selling price.

+ References

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- Definition

Amount of increase in allowance for credit loss on financing receivable from recovery.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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-Name Accounting Standards Codification
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- Definition

Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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