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Note 12 - Commitments and Contingencies (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Nov. 22, 2022
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2016
Contractual Obligation   $ 1,690,000   $ 1,690,000    
Professional Services and Technology Acquisition Agreement [Member]            
Payments to Acquire Businesses, Gross $ 700,000          
Related Party Technology License Agreement [Member] | Syzygy Licensing LLC [Member]            
Royalty Payments, Percentage of Product Revenue           4.00%
Maximum Royalties to Be Paid Under Agreement           $ 1,000
Royalty Expense   122,000 $ 61,000 185,000 $ 147,000  
Royalty Guarantees, Commitments, Amount   $ 95,000   $ 95,000