Note 3 - Significant Accounting Policies - Carrying Amount of Assets and Liabilities associated with VIE's (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Jun. 30, 2021
Investments in securities at fair value	$ 12,138	$ 6,322
Investments in equity securities at fair value, non-current	2,162	11,936
Total VIE assets, maximum exposure to loss	58,362	62,277
Variable Interest Entity, Not Primary Beneficiary [Member]
Investments in securities at fair value	12,138	6,322
Investments in equity securities at fair value, non-current	623	938
Other receivables	21	54
Total VIE assets, maximum exposure to loss	12,782	7,314
Other accrued expenses	110	0
Total carrying amount	$ 12,672	$ 7,314