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Note G - Income Taxes (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jun. 30, 2023 | Jun. 30, 2022
Federal, State and Local Income Tax Expense (Benefit), Gross, Continuing Operations | $ 800 | $ 2,000
Foreign Income Tax Expense (Benefit), Continuing Operations | 200 | $ 900
Operating Loss Carryforwards | $ 5,600 |
Effective Income Tax Rate Reconciliation, Percent | 29.10% | 21.60%
Dividends and Interest Paid | $ 14,700 |
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 | 23.00% |
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent | 5.00% |
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount | $ 700 |

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