Note I - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Effective Income Tax Rate Reconciliation, Percent	19.90%	20.70%	20.10%	20.50%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 0		$ 0