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Note 1- Management Statement (Details Textual) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2024
Dec. 31, 2023
Selling, General and Administrative Expenses [Member]        
Research and Development Expense $ 5.3 $ 5.1 $ 10.2 $ 10.4