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Note 1 - Organization and Summary of Significant Accounting Policies - Prepaid Expenses and Other Current Assets (Details) - USD ($) | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Prepaid insurance | $ 209,888 | $ 265,429
Prepaid expenses - various | 117,887 | 124,273
Prepaid taxes | 0 | 2,534
Prepaid Expense and Other Assets, Current | $ 327,775 | $ 392,236

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