Note B - Summary of Significant Accounting Policies (Details Textual)	1 Months Ended	3 Months Ended		12 Months Ended
	Dec. 31, 2022	Jul. 31, 2023 USD ($) shares	Jul. 31, 2022 USD ($)	Apr. 30, 2023 USD ($)	Apr. 30, 2022 USD ($)
Number of Reportable Segments		1
Average Finance Receivable Interest Rate		16.78%
Financing Receivable Interest Rate	16.50%	18.00%
Interest Receivable		$ 6,757,000		$ 6,115,000
Finance Receivables, Customer Payments Due Either Weekly or Bi-Weekly, Percentage		79.00%
Financing Receivable, Greater Than or Equal to 30 Days Past Due, Percent of Portfolio		4.40%		3.60%
Allowance for Credit Losses, Primary Factor Units Repossessed or Charged Off Evaluation Period (Day)		69 days
Financing Receivable, Weighted Average Total Contract Term (Month)		46 months 27 days
Financing Receivable, Remaining Contract Term (Month)		36 months 18 days
Financing Receivable, Allowance for Credit Loss		$ 314,442,000	$ 255,836,000	$ 299,608,000	$ 237,823,000
Finance Receivables, Allowance, Percent of Principle Balance		23.91%
Finance Receivable, Principal Balance		$ 1,440,707,000	1,185,276,000	1,373,372,000
Average Age of Account at Charge-Off Date (Month)		12 months 12 days
Goodwill, Impairment Loss		$ 0		0
Goodwill		11,700,000		11,700,000
Tangible Asset Impairment Charges		$ 12,000	$ 0
Effective Income Tax Rate Reconciliation, Percent		19.80%	22.70%
Tax Adjustments, Settlements, and Unusual Provisions		$ 130,000	$ 206,000
Income Tax Examination, Penalties and Interest Accrued		0		0
Financing Receivable, Recorded Investment Greater Than 90 Days Past Due		4,900,000	2,700,000
Late Fee Income Generated by Servicing Financial Assets, Amount		1,200,000	$ 970,000
Contract with Customer, Liability, Revenue Recognized		$ 12,300,000
Treasury Stock Shares to Establish Reserve Account to Secure Service Contracts | shares		10,000
ACM Insurance Company [Member]
Treasury Stock, Shares to Establish Reserve Account to Meet Regulatory Requirements for Insurance Company | shares		14,000
Accident Protection Plan [Member]
Contract with Customer, Liability		$ 54,700,000
Service Contract [Member]
Contract with Customer, Liability		$ 70,883,000		$ 67,404,000
Maximum [Member]
Financing Receivable Interest Rate		18.00%
Revolving Credit Facility [Member]
Line of Credit Facility, Distribution Limitations, Maximum Aggregate Amount of Stock Repurchases		$ 50,000,000
Line of Credit Facility, Distribution Limitations Percentage of Sum of Borrowing Bases		20.00%
Line of Credit Facility, Distribution Limitations Percentage of Consolidated Net Income		75.00%
Line of Credit Facility Distribution Limitations Minimum Percentage of Aggregate Funds Available		12.50%
ARKANSAS
Financing Receivable Interest Rate		16.50%
ARKANSAS | Maximum [Member]
Financing Receivable Interest Rate		17.00%
ILLINOIS | Minimum [Member]
Financing Receivable Interest Rate		19.50%
ILLINOIS | Maximum [Member]
Financing Receivable Interest Rate		21.50%
TENNESSEE
Financing Receivable Interest Rate		23.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Arkansas, USA [Member]
Concentration Risk, Percentage		27.60%