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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 |  |  |

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