Note G - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Federal, State and Local Income Tax Expense (Benefit), Gross, Continuing Operations	$ 2,000	$ 600
Operating Loss Carryforwards	$ 3,400
Effective Income Tax Rate Reconciliation, Percent, Total	21.60%	11.30%
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 0
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Fiscal Years After June 30, 2021 [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Foreign Tax Authority [Member] | Swiss Federal Tax Administration (FTA) [Member]
Effective Income Tax Rate Reconciliation, Percent, Total	20.00%