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Note 6 - Stock-based Compensation Expense (Details Textual) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2024
Dec. 31, 2023
Dec. 31, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value   $ 0 $ 10.98
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount $ 342,156 $ 554,592  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition 1 year 1 month 6 days 1 year 6 months  
Prepaid Expense, Value of Stock Issued for Services During Period   $ 16,667