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Note 1 - Basis of Presentation - Carrying Amount of Assets and Liabilities associated with VIE's (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Investments in trading securities at fair value, current $ 9,692 $ 9,644  
Total VIE assets, maximum exposure to loss 48,758 51,963 $ 52,772
Variable Interest Entity, Not Primary Beneficiary [Member]      
Investments in trading securities at fair value, current 9,692 9,644  
Investments in trading securities at fair value, non-current 837 806  
Other receivables 483 28  
Total VIE assets, maximum exposure to loss $ 11,012 $ 10,478