Note 1 - Basis of Presentation - Carrying Amount of Assets and Liabilities associated with VIE's (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Investments in securities at fair value, current	$ 11,991	$ 12,138
Investments in equity securities at fair value, non-current	1,273	2,162
Total VIE assets, maximum exposure to loss	54,951	58,362	$ 64,191
Variable Interest Entity, Not Primary Beneficiary [Member]
Investments in securities at fair value, current	11,991	12,138
Investments in equity securities at fair value, non-current	630	623
Other receivables	38	21
Total VIE assets, maximum exposure to loss	12,659	12,782
Other accrued expenses	0	110
Total carrying amount	$ 12,659	$ 12,672