Note B - Summary of Significant Accounting Policies (Details Textual)		3 Months Ended
	Jul. 12, 2024 USD ($)	Jul. 31, 2024 USD ($) shares	Jul. 31, 2023 USD ($)	Jun. 03, 2024 USD ($)	Apr. 30, 2024 USD ($)
Number of Reportable Segments		1
Revenue from Contract with Customer, Excluding Assessed Tax		$ 287,248,000	$ 310,337,000
Financing Receivables, Allowance for APP Claims		2,757,000			$ 3,171,000
Financing Receivable, Insurance Receivables for APP Claims		2,468,000			3,026,000
Proceeds from Notes Payable		$ 149,889,000	360,340,000
Average Finance Receivable Interest Rate		17.40%
Financing Receivable Interest Rate		18.25%
Interest Receivable		$ 7,507,000			$ 6,907,000
Finance Receivables, Customer Payments Due Either Weekly or Bi-Weekly, Percentage		78.00%
Financing Receivable, Greater Than or Equal to 30 Days Past Due, Percent of Portfolio		3.50%			3.10%
Allowance for Credit Losses, Primary Factor Units Repossessed or Charged Off Evaluation Period		70 years
Financing Receivable, Weighted Average Total Contract Term		48 months 3 days
Financing Receivable, Remaining Contract Term		36 months 3 days
Financing Receivables, Allowance for Credit Losses and Other Losses		$ 334,400,000
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent		25.00%			25.32%
Finance Receivable, Principal Balance		$ 1,465,259,000	1,440,707,000		$ 1,435,388,000
Goodwill, Impairment Loss		46,000	$ 0
Goodwill		$ 22,900,000			14,400,000
Effective Income Tax Rate Reconciliation, Percent		18.50%	19.80%
Tax Adjustments, Settlements, and Unusual Provisions		$ 0	$ 130,000
Open Tax Year		2021
Income Tax Examination, Penalties and Interest Accrued		$ 0			0
Financing Receivable, Recorded Investment Greater Than 90 Days Past Due		5,600,000	4,900,000
Late Fee Income Generated by Servicing Financial Assets, Amount		1,200,000
Contract with Customer, Liability, Revenue Recognized		$ 12,600,000
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
Capitalized Computing Implementation Service Contract [Member]
Capitalized Contract Cost, Net		$ 18,100,000			16,700,000
Capitalized Contract Cost, Amortization		958,000	48,000
Texas Auto Center [Member]
Goodwill, Acquired During Period		8,500,000
Goodwill				$ 8,500,000
Accident Protection Plan [Member]
Contract with Customer, Liability		52,000,000
Service Contract [Member]
Contract with Customer, Liability		69,651,000			$ 68,945,000
Accident Protection Plan Claims [Member]
Contract with Customer, Refund Liability		$ 5,200,000
Maximum [Member]
Financing Receivable Interest Rate		18.25%
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%
Warehouse Facility [Member]
Proceeds from Notes Payable	$ 150,000,000	$ 150,000,000
Notes Payable, Percentage of Note Classified as Non-Recourse	10.00%
ARKANSAS
Financing Receivable Interest Rate		16.75%
ARKANSAS | Maximum [Member]
Financing Receivable Interest Rate		16.75%
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		29.00%
Revision of Prior Period, Adjustment [Member]
Accident Protection Plan Claims		$ 11,700,000
Revenue from Contract with Customer, Excluding Assessed Tax			1,200,000
Financing Receivables, Allowance for APP Claims			5,800,000
Financing Receivable, Insurance Receivables for APP Claims			$ 5,900,000
Revision of Prior Period, Adjustment [Member] | Wholesales Third Party [Member]
Revenue from Contract with Customer, Excluding Assessed Tax		$ 1,200,000