Note I - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2021	Dec. 31, 2020
Effective Income Tax Rate Reconciliation, Percent, Total	22.80%	20.80%		22.60%	7.20%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				21.00%
Effective Income Tax Rate Reconciliation, Global Intangible Low-taxed Income, Amount			$ 400
Income Tax Benefit Cares Act					$ 300
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 0			$ 0