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Note 1 - Organization and Summary of Significant Accounting Policies - Prepaid Expenses and Other Current Assets (Details) - USD ($)
Sep. 30, 2021
Dec. 31, 2020
Prepaid insurance $ 504,690 $ 204,988
Prepaid research and development expenses 40,411 0
Prepaid expenses - other 24,060 72,403
Prepaid taxes 804 3,164
Prepaid Expense and Other Assets, Current $ 569,965 $ 280,555