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Note 1 - Organization and Summary of Significant Accounting Policies - Accounts Payable (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Research and development expenses	$ 904,572	$ 766,001
Legal expenses	24,496	26,994
Other	84,031	150,383
Accounts Payable, Current, Total	$ 1,013,099	$ 943,378

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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