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Note 2 - Liquidity and Uncertainties (Details Textual) - USD ($) |  | 3 Months Ended | 6 Months Ended | 60 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 01, 2024 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Apr. 01, 2029 | Dec. 31, 2023
Retained Earnings (Accumulated Deficit) |  | $ (124,556,400) |  | $ (124,556,400) |  |  | $ (123,339,509)
Operating Income (Loss) |  | (1,780,423) | $ (2,277,550) | (3,245,491) | $ (3,620,226) |  |
Cash, Cash Equivalents, and Marketable Securities |  | 5,800,000 |  | 5,800,000 |  |  |
Working Capital |  | $ 7,700,000 |  | 7,700,000 |  |  |
Net Cash Provided by (Used in) Operating Activities |  |  |  | $ (434,473) | $ (3,027,126) |  |
Proceeds From Sale of Net Operating Loss Amount | $ (2,000,000) |  |  |  |  |  |
New Jersey Technology Business Tax Certificate Transfer Program (”NJEDA Program”) [Member] |  |  |  |  |  |  |
Government Assistance, Physical Presence Requirement Period (Year) |  |  |  |  |  | 5 years |
Government Assistance, Contingent Liability, Amount | $ 2,200,000 |  |  |  |  |  |

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