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Note O - Stock Options (Details Textual) - USD ($)			12 Months Ended
	Jan. 27, 2016	Oct. 12, 2004	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term			5 years	5 years 233 days
Share Price			$ 0.75
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 1.53	$ 2.32
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value			$ 0	$ 5,667
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value				$ 946,435	$ 197,281
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options			$ 1,228,771
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			1 year 182 days
In The Money Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number				0
The2004 Stock Option Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance		166,667
The2004 Stock Option Plan [Member] | Nonstatutory Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term		10 years
The2004 Stock Option Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent		85.00%
The 2015 Equity Incentive Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance	666,667
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
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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Unrecognized cost of unvested options awarded to employees as compensation.

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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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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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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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