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Note 17 - Subsequent Events (Details Textual) - USD ($) | Feb. 09, 2024 | Dec. 31, 2023 | Dec. 31, 2022
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Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  | $ 6.3 | $ 6.36
Subsequent Event [Member] | Warrants Issued in Private Placement [Member] |  |  |
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants (in shares) | 1,006,488 |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 0.4423 |  |
Subsequent Event [Member] | Warrants Issued in Private Placement [Member] | President and Chief Executive Officer [Member] |  |  |
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants (in shares) | 54,054 |  |
Securities Purchase and Registration Rights Agreement [Member] | Subsequent Event [Member] |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | 2,012,978 |  |
Shares Issued, Price Per Share (in dollars per share) | $ 0.4331 |  |
Proceeds from Issuance of Common Stock | $ 875,000 |  |
Securities Purchase and Registration Rights Agreement [Member] | Subsequent Event [Member] | President and Chief Executive Officer [Member] |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | 108,108 |  |
Shares Issued, Price Per Share (in dollars per share) | $ 0.4625 |  |

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