Note H - Employee Benefit Plans (Details Textual) - USD ($)		12 Months Ended
	Jan. 01, 2004	Jun. 30, 2024	Jun. 30, 2023
Health Insurance Plan Premium Expense		$ 1,400,000	$ 1,700,000
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount		$ 900,000	$ 600,000
Number of Years Compensation Used for Benefit Obligation Assumptions (Year)		5 years
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		5.28%	4.89%
Defined Benefit Plan, Plan Assets, Contributions by Employer		$ 116,000	$ 0
Defined Benefit Plan, Expected Amortization, Next Fiscal Year		$ 24,000
Defined Benefit Plan Equity Securities by Type, Percentage		4.00%
Large-cap Funds [Member]
Defined Benefit Plan Equity Securities by Type, Percentage		72.00%
Developed Market Funds [Member]
Defined Benefit Plan Equity Securities by Type, Percentage		24.00%
Fixed Income Funds [Member]
Defined Benefit Plan Equity Securities by Type, Percentage		77.00%
Developed Market Fixed Income Funds [Member]
Defined Benefit Plan Equity Securities by Type, Percentage		23.00%
First Contributions [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	100.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay		5.00%
Profit-sharing Plan [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount		$ 600,000	700,000
Discretionary Profit-sharing Plan [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount		$ 0	$ 0