Note 1 - Basis of Presentation - Carrying Amount of Assets and Liabilities associated with VIE's (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2021
Investments in securities at fair value, current	$ 11,963	$ 12,138
Investments in equity securities at fair value, non-current	4,383	4,290
Total VIE assets, maximum exposure to loss	59,323	60,694	$ 61,917
Variable Interest Entity, Not Primary Beneficiary [Member]
Investments in securities at fair value, current	11,963	12,138
Investments in equity securities at fair value, non-current	608	623
Other receivables	11	21
Total VIE assets, maximum exposure to loss	12,582	12,782
Other accrued expenses	0	110
Total carrying amount	$ 12,582	$ 12,672