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Note 14 - Related Party Transactions (Details Textual) - USD ($)
3 Months Ended
Jun. 29, 2023
Mar. 31, 2024
Mar. 31, 2023
Sep. 30, 2016
Executive Chairman [Member]        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 2,068,966      
Proceeds from Issuance or Sale of Equity $ 3,000      
Mr. Elwood Norris [Member]        
Reimbursement of Expenses to Related Party, Monthly Amount   $ 1,500    
Consulting Fees to Related Party, Monthly Amount   7,500    
Related Party Transaction, Amounts of Transaction   15,000 $ 23,000  
Mr. Elwood Norris [Member] | Related Party Technology License Agreement [Member]        
Royalty Payments, Percentage of Product Revenue       4.00%
Maximum Royalties to Be Paid Under Agreement       $ 1,000,000
Royalty Expense   $ 46,000 $ 24,000  
Series A Preferred Stock [Member] | Executive Chairman [Member]        
Stock Issued During Period, Shares, New Issues 3,000