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Note 10 - Income Taxes (Details Textual) - USD ($) $ in Thousands |  |  | 12 Months Ended
--- | --- | --- | ---
Apr. 01, 2018 | Apr. 01, 2017 | Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2023
Deferred Tax Liabilities, Net |  |  | $ 0 | $ 0 |
Deferred Tax Assets, Operating Loss Carryforwards |  |  | $ 0 | $ 0 |
Foreign Tax Jurisdiction [Member] | Inland Revenue, Hong Kong [Member] |  |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  | 16.50% | 16.50% | 16.50% | 16.50%
Foreign Tax Jurisdiction [Member] | Inland Revenue, Hong Kong [Member] | Subsidiaries [Member] |  |  |  |  |
Operating Loss Carryforwards |  |  | $ 8,074 | $ 5,545 |
Foreign Tax Jurisdiction [Member] | Inland Revenue, Hong Kong [Member] | First HK$2.0 Million Profits [Member] |  |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 8.25% |  |  |  |
Foreign Tax Jurisdiction [Member] | Inland Revenue, Hong Kong [Member] | Subsequent Profits [Member] |  |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 16.50% |  |  |  |

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