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Note 4 - Fair Value Measurements (Details Textual) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Jun. 30, 2025
Mar. 31, 2023
Payment for Contingent Consideration Liability, Financing Activities $ 330 $ (0)    
Equity Securities without Readily Determinable Fair Value, Amount $ 2,000      
Debt Securities, Available-for-Sale     $ 3,629 $ 2,700