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Note 13 - Income Taxes (Details Textual) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Effective Income Tax Rate Reconciliation, Percent | 0.40% | 1.15% |
Payroll Related Tax Credit Utilized | $ 0.2 |  |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | 2.4 |  |
Other Current Liabilities [Member] |  |  |
Payroll Related Credits COVID 19 |  |  | $ 1.3
Domestic Tax Jurisdiction [Member] |  |  |
Operating Loss Carryforwards | 241.7 | $ 222.2 |
Operating Loss Carryforwards, Subject to Expiration | 31.0 | 31.0 |
Operating Loss Carryforwards, Not Subject to Expiration | 210.6 | 191.0 |
State and Local Jurisdiction [Member] |  |  |
Operating Loss Carryforwards | $ 150.3 | $ 128.1 |

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