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Note 9 - Debt (Details Textual) - USD ($)
12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Line of Credit Facility, Maximum Borrowing Capacity   $ 1,000,000
Proceeds from Notes Payable $ 75,000 0
Line of Credit [Member] | Money Market Funds [Member]    
Debt Instrument, Collateral Amount   $ 1,000,000