Note B - Liquidity and Uncertainties (Details Textual) - USD ($)	1 Months Ended		12 Months Ended
	Jun. 30, 2020	Apr. 30, 2020	Dec. 31, 2021	Dec. 31, 2020
Retained Earnings (Accumulated Deficit), Ending Balance			$ (107,704,274)	$ (100,885,957)
Net Income (Loss) Attributable to Parent, Total			$ (6,818,317)	$ (7,337,273)
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)			$ 2.18	$ 1.97
Warrants Associated With April 2020 Public Offering [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		2,710,000
Warrants and Rights Outstanding, Term (Year)		3 years
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)		$ 1.20
Warrants Associated With the June 2020 Public Offering [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	3,749,000
Warrants and Rights Outstanding, Term (Year)	3 years
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 2.60
April 6, 2020 Public Offering [Member]
Proceeds from Issuance of Common Stock, Gross		$ 5,100,000
Stock Issued During Period, Shares, New Issues (in shares)		5,420,000
Share Price (in dollars per share)		$ 0.95
June 30, 2020 Public Offering [Member]
Proceeds from Issuance of Common Stock, Gross	$ 14,600,000
Stock Issued During Period, Shares, New Issues (in shares)	6,770,000
Share Price (in dollars per share)	$ 2.15