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Note 6 - Stock-Based Compensation Expense (Details Textual) - USD ($)
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount $ 451,023  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition 1 year 3 months 18 days  
Expense Related To Consulting And Investment Banking Agreements [Member]    
Share-Based Payment Arrangement, Expense $ 54,167 $ 18,000
Share-Based Payment Arrangement, Option [Member]    
Share-Based Payment Arrangement, Expense $ 103,569 $ 228,039