Note H - Employee Benefit Plans (Details Textual) - USD ($)		12 Months Ended
	Jan. 01, 2004	Jun. 30, 2022	Jun. 30, 2021
Health Insurance Plan Premium Expense		$ 1,400,000	$ 1,200,000
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount		$ 300,000	$ 1,500,000
Number of Years Compensation Used for Benefit Obligation Assumptions (Year)			5 years
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		4.39%	2.74%
Defined Benefit Plan, Plan Assets, Contributions by Employer		$ 0	$ 7,000
Defined Benefit Plan, Expected Amortization, Next Fiscal Year, Total		$ 50,000
Large-cap Funds [Member]
Defined Benefit Plan Equity Securities by Type, Percentage		51.00%
Developed Market Funds [Member]
Defined Benefit Plan Equity Securities by Type, Percentage		24.00%
Mid-cap Funds [Member]
Defined Benefit Plan Equity Securities by Type, Percentage		19.00%
Small Cap Funds [Member]
Defined Benefit Plan Equity Securities by Type, Percentage		6.00%
Fixed Income Funds [Member]
Defined Benefit Plan Equity Securities by Type, Percentage		42.00%
Developed Market Fixed Income Funds [Member]
Defined Benefit Plan Equity Securities by Type, Percentage		58.00%
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		$ 500,000	400,000
Discretionary Profit-sharing Plan [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount		$ 500,000	$ 0