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Note 9 - 2020 Cash Incentive Bonus Plan (Details Textual) - Cash Incentive Bonus Plan [Member] $ in Thousands |  |  | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 06, 2025 USD ($) | Feb. 13, 2025 USD ($) | Sep. 30, 2025 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 | Mar. 31, 2021 USD ($) | Oct. 31, 2020 USD ($)
Performance Plan, Valuation Milestone Amount |  |  |  |  |  |  |  | $ 74,300 |
Performance Plan, Minimum Number of Days Valuation Milestone Must be Achieved and Maintained (Day) | 20 days |  |  |  |  |  |  |  |
Cash Incentive Bonus Award |  |  |  |  |  |  |  |  | $ 6,500
Cash Bonus Incentive, Incremental Amounts |  | 11 |  |  |  |  | 11 |  |
Valuation Milestones Achieved |  |  | $ 0 | $ 0 | $ 0 | $ 0 |  |  |
Payments for Cash Incentive Bonus |  | $ 0 | $ 0 |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |
Performance Plan, Valuation Milestone Amount | $ 5,000,000 |  |  |  |  |  |  |  |
Performance Plan, Merger Consideration Milestone | 8,000,000 |  |  |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |
Performance Plan, Valuation Milestone Amount | $ 200,000 |  |  |  |  |  |  |  |

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