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Note 6 - Stock-Based Compensation Expense (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount $ 738,281   $ 738,281  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition     1 year 7 months 6 days  
Prepaid Expense, Value of Stock Issued for Services During Period 104,167   $ 104,167  
Expense Related To Consulting And Investment Banking Agreements [Member]        
Share-Based Payment Arrangement, Expense 70,833 $ 48,375 132,333 $ 80,322
Share-Based Payment Arrangement, Option [Member]        
Share-Based Payment Arrangement, Expense $ 227,114 $ 190,191 $ 681,166 $ 570,573