Note 2 - Significant Accounting Policies - Carrying Amount of Assets and Liabilities Associated With VIE's (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Jun. 30, 2024
Investments in trading securities at fair value, current	$ 9,692	$ 9,644
Total Assets	48,064	51,963
Variable Interest Entity, Not Primary Beneficiary [Member]
Investments in trading securities at fair value, current	9,692	9,644
Investments in trading securities at fair value, non-current	872	806
Other receivables	439	28
Total Assets	$ 11,003	$ 10,478