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Note 16 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended |  |
--- | --- | --- | --- | ---
Oct. 01, 2024 | Sep. 30, 2024 | Dec. 31, 2023 | Sep. 30, 2023
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  | 5,271,604 | 5,271,604 |
Cash |  | $ 14,645 |  | $ 42,113
Share Subscription Payable [Member] |  |  |  |
Cash |  | 3,800 |  |
Subsequent Event [Member] | Registered Direct Offering [Member] |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | 17,626 |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 0.001 |  |  |
Subsequent Event [Member] | Prefunded Warrants [Member] |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | 424,358 |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 0.001 |  |  |
Subsequent Event [Member] | Warrants for Common Stock [Member] |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | 1,546,914 |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 4.82 |  |  |
Registered Direct Offering [Member] | Subsequent Event [Member] |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | 725,000 |  |  |
Proceeds from Issuance or Sale of Equity | $ 3,500 |  |  |
Placement Agent Fee, Percentage of Gross Proceeds | 6.00% |  |  |
Private Placement [Member] |  |  |  |
Proceeds from Issuance or Sale of Equity |  | $ 3,800 |  |
Private Placement [Member] | Subsequent Event [Member] |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | 379,930 |  |  |
Proceeds from Issuance or Sale of Equity | $ 3,800 |  |  |
Private Placement [Member] | Subsequent Event [Member] | Certain Directors, Executive Officers, and Affiliated Entities [Member] |  |  |  |
Proceeds from Issuance or Sale of Equity | $ 1,300 |  |  |

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