Note I - Income Taxes (Details Textual)	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Effective Income Tax Rate Reconciliation, Percent, Total	20.70%	22.80%	20.50%	22.60%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%