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Note 6 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Dec. 31, 2025
Effective Income Tax Rate Reconciliation, Percent | 11.90% | 22.80% |
Unrecognized Tax Benefits, Ending Balance | $ 0 |  | $ 0
Income Tax Jurisdiction, Domestic Federal [Member] | Internal Revenue Service (IRS) [Member] |  |  |
Operating Loss Carryforwards |  |  | 8,800
Tax Credit Carryforward, Amount |  |  | 3,400
Open Tax Year | 2011 2012 2013 2014 2015 |  |
Income Tax Jurisdiction, Domestic State and Local [Member] |  |  |
Open Tax Year | 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |  |
Income Tax Jurisdiction, Domestic State and Local [Member] | Internal Revenue Service (IRS) [Member] |  |  |
Operating Loss Carryforwards |  |  | $ 5,100
Income Tax Jurisdiction, Foreign [Member] |  |  |
Deferred Tax Assets, Valuation Allowance | $ 0 |  |
Income Tax Jurisdiction, Foreign [Member] | His Majesty's Revenue and Customs (HMRC) [Member] |  |  |
Operating Loss Carryforwards | $ 10,000 |  |
Income Tax Jurisdiction, Foreign, Other [Member] |  |  |
Open Tax Year | 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |  |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + Details
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