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Note 2 - Significant Accounting Policies (Details Textual) | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2024 USD ($) | Jun. 30, 2024 | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Jul. 16, 2024 USD ($) | May 07, 2024 $ / shares | Jan. 03, 2024 $ / shares
Class of Warrant or Right, Fair Value of Common Stock Warrants per Warrant (in dollars per share) | $ / shares |  |  |  |  |  |  |  | $ 6.71
Class of Warrant or Right, Redemption Price per Share (in dollars per share) | $ / shares |  |  |  |  |  |  | $ 0.001 |
Number of Operating Segments |  | 1 |  |  |  |  |  |
Proceeds from Insurance Settlement, Operating Activities | $ 1,100,000 |  | $ 0 | $ 9,900,000 | $ 100,000 |  |  |
Insurance Settlements, Maximum Recovery Limit | 10,000,000 |  |  |  |  |  |  |
Former Senior Vice President [Member] |  |  |  |  |  |  |  |
Consulting Agreement, Term |  |  |  |  |  | 1 |  |
Consulting Service, Price Per Hour |  |  |  |  |  | $ 500 |  |
Related Party Transaction, Amounts of Transaction | $ 29,000 |  |  |  |  |  |  |
Former Senior Officer [Member] |  |  |  |  |  |  |  |
Severance Costs |  |  |  | $ 1,700,000 |  |  |  |
Number of Former Employees |  |  |  | 2 |  |  |  |
Building [Member] |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) | 39 years |  |  | 39 years |  |  |  |
Building Improvements [Member] |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) | 10 years |  |  | 10 years |  |  |  |
Share-Based Payment Arrangement, Option [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) | 2 years |  |  |  |  |  |  |
Share-Based Payment Arrangement, Option [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) | 4 years |  |  |  |  |  |  |

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