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Note E - Line of Credit (Details Textual) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2023
Jun. 30, 2023
Jun. 30, 2021
Line of Credit Facility, Maximum Borrowing Capacity     $ 250,000
Long-Term Line of Credit $ 0    
Interest Expense, Debt $ 0 $ 0