Note 6 - Convertible Promissory Note- Shcedule of Convertible Debt (Details) - The July 2019 Note [Member] - Convertible Debt [Member] - USD ($)	3 Months Ended	12 Months Ended
Mar. 31, 2023	Dec. 31, 2022	Jan. 31, 2023	Jul. 23, 2019
Maturity Date	Jul. 31, 2023	Jul. 31, 2023
Stated Interest Rate	24.00%	24.00%		24.00%
Conversion Price (in dollars per share)	$ 2.65	$ 6.30	$ 2.87
Face Value	$ 397,000	$ 1,000,000		$ 1,000,000
Debt Discount	(40,000)	(38,000)
Debt Premium	66,000	0
Carrying Value	$ 423,000	$ 962,000

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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The price per share of the conversion feature embedded in the debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

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Amount of debt discount to be amortized within one year or within the normal operating cycle, if longer.

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Amount, after accumulated amortization, of debt premium.

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