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Note 1 - Organization and Summary of Significant Accounting Policies - Accounts Payable (Details) - USD ($) | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Research and development expenses | $ 508,068 | $ 1,067,958
Legal expenses | 25,003 | 56,514
Other | 67,077 | 151,841
Accounts Payable, Current | $ 600,148 | $ 1,276,313

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