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Note Q - Stock Options (Details Textual) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Jan. 27, 2016
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term			2 years 1 month 20 days	3 years 10 days	3 years 10 months 13 days
Share Price			$ 0.59	$ 2.21	$ 3.52
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number			194,561
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value			$ 0	$ 0	$ 0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)	0	0	0	0	0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value			$ 100,668	$ 252,874
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount			$ 17,630
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			7 months 20 days
In The Money Options [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number			0	0	0
The 2015 Equity Incentive Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance				789,000		187,500
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term			10 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)			(0)	(0)
The 2015 Equity Incentive Plan [Member] | Minimum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent			100.00%
The 2015 Equity Incentive Plan [Member] | Maximum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent			110.00%

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- Definition

Aggregate number of common shares reserved for future issuance.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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