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Note 1 - Organization and Summary of Significant Accounting Policies - Prepaid Expenses and Other Current Assets (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Prepaid insurance	$ 94,841	$ 204,988
Prepaid expenses - various	120,534	72,403
Prepaid taxes	814	3,164
Prepaid Expense and Other Assets, Current	$ 216,189	$ 280,555

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Amount of asset related to consideration paid in advance for other costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

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