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Note 1 - Organization and Summary of Significant Accounting Policies - Accounts Payable (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Research and development expenses	$ 1,067,958	$ 1,363,889
Legal expenses	56,514	27,675
Other	151,841	156,389
Accounts Payable, Current, Total	$ 1,276,313	$ 1,547,953

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- Definition

Represents current research and development in process.

+ References

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Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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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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