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Note 1 - Basis of Presentation and Consolidation (Details Textual) - USD ($)
Mar. 31, 2025
Jun. 30, 2024
Jul. 01, 2023
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount $ 11,000,000 $ 10,500,000  
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Noncurrent 71,000 132,000  
Retained Earnings (Accumulated Deficit) $ 36,407,000 $ 37,460,000  
Accounting Standards Update 2016-13 [Member]      
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Noncurrent     $ 232,000
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]      
Retained Earnings (Accumulated Deficit)     $ (183,000)