Note 2 - Liquidity and Summary of Significant Accounting Principles (Details Textual) - USD ($)	3 Months Ended			12 Months Ended
	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Retained Earnings (Accumulated Deficit)	$ (27,620,560)			$ (26,764,805)
Cash and Cash Equivalents, at Carrying Value	1,250,261		$ 665,391	2,051,208	$ 1,414,569
Cash, Uninsured Amount	1,300,000
Accounts Receivable, Allowance for Credit Loss	0			0
Inventory, Finished Goods, Gross	137,000			157,000
Inventory, Raw Materials, Gross	75,000			83,000
Inventory Valuation Reserves	0			0
Revenue from Contract with Customer, Including Assessed Tax	$ 61,100		$ 0
Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	1 year
Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	6 years
Asset Pledged as Collateral [Member] | Corporate Credit Card [Member]
Restricted Cash	$ 55,000			55,000
Private Placement [Member]
Proceeds from Issuance of Private Placement		$ 3,957,757		$ 4,500,000