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Note 10 - Contingencies (Details Textual) $ in Thousands |  |  |  |  |  | 1 Months Ended | 2 Months Ended | 3 Months Ended | 9 Months Ended | 20 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 06, 2024 | Aug. 06, 2024 | Mar. 18, 2024 | Jul. 05, 2022 | Jun. 30, 2022 | Feb. 28, 2025 USD ($) | Oct. 26, 2021 | Sep. 30, 2025 USD ($) | Sep. 30, 2025 USD ($) | Jun. 20, 2023 | Jun. 20, 2023 | Oct. 01, 2025 USD ($) | May 31, 2025 USD ($)
Estimated Litigation Liability |  |  |  |  |  |  |  | $ 35,250 | $ 35,250 |  |  |  |
Loss Contingency Accrual, Provision |  |  |  |  |  |  |  | 0 | 35,250 |  |  |  |
Violations of Federal Securities Laws [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, New Claims Filed, Number |  |  |  |  | 1 |  | 4 |  |  |  |  |  |
Estimated Litigation Liability |  |  |  |  |  |  |  | $ 31,250 | $ 31,250 |  |  |  | $ 31,250
Shareholder Derivative Actions, Texas Court [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, New Claims Filed, Number |  |  |  |  |  |  |  |  |  | 4 | 2 |  |
Shareholder Derivative Actions, Texas State Court Member |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, New Claims Filed, Number |  |  |  |  |  |  |  |  |  |  | 1 |  |
Shareholder Derivative Actions, Delaware Court [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, New Claims Filed, Number |  |  |  |  |  |  |  |  |  |  | 1 |  |
Shareholder Derivative Actions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, New Claims Filed, Number | 2 |  | 2 | 3 |  |  |  |  |  |  |  |  |
Legal Fees |  |  |  |  |  | $ 1,000 |  |  |  |  |  |  |
Anti-SLAPP Lawsuit [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Former Employees |  | 2 |  |  |  |  |  |  |  |  |  |  |
Anti-SLAPP Lawsuit [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Litigation Liability |  |  |  |  |  |  |  |  |  |  |  | $ 2,500 |

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