Note 1 - Basis of Presentation - Carrying Amount of Assets and Liabilities associated with VIE's (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022
Statement [Line Items]
Investments in securities at fair value, current	$ 11,701	$ 12,138
Investments in equity securities at fair value, non-current	1,483	2,162
Total VIE assets, maximum exposure to loss	55,745	58,362	$ 62,515
Variable Interest Entity, Not Primary Beneficiary [Member]
Statement [Line Items]
Investments in securities at fair value, current	11,701	12,138
Investments in equity securities at fair value, non-current	745	623
Other receivables	34	21
Total VIE assets, maximum exposure to loss	12,480	12,782
Other accrued expenses	0	110
Total carrying amount	$ 12,480	$ 12,672