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Note 13 - Commitments and Contingencies (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Sep. 30, 2016
Contractual Obligation $ 941,000   $ 941,000    
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 $ 20,000 $ 40,000 $ 66,000 $ 64,000