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Note 3 - Significant Accounting Policies - Carrying Amount of Assets and Liabilities Associated With VIE's (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Jun. 30, 2022
Investments in equity securities at fair value, current $ 11,642 $ 12,138
Investments in equity securities at fair value, non-current 1,563 2,162
Total VIE assets, maximum exposure to loss 55,673 58,362
Variable Interest Entity, Not Primary Beneficiary [Member]    
Investments in equity securities at fair value, current 11,642 12,138
Investments in equity securities at fair value, non-current 785 623
Other receivables 45 21
Total VIE assets, maximum exposure to loss 12,472 12,782
Other accrued expenses 0 110
Total carrying amount $ 12,472 $ 12,672