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Note 6 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Effective Income Tax Rate Reconciliation, Percent | 28.10% | 259.10% |
Unrecognized Tax Benefits, Ending Balance | $ 0 |  | $ 0
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] |  |  |
Operating Loss Carryforwards |  |  | 40,952
Tax Credit Carryforward, Amount |  |  | $ 2,600
Open Tax Year | 2005 2006 2007 2011 2012 2013 2014 2015 2019 2020 2021 2022 |  |
Foreign Tax Authority [Member] |  |  |
Deferred Tax Assets, Valuation Allowance | $ 0 |  |
Open Tax Year | 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 |  |
Foreign Tax Authority [Member] | Her Majesty's Revenue and Customs (HMRC) [Member] |  |  |
Operating Loss Carryforwards | $ 10,000 |  |
State and Local Jurisdiction [Member] |  |  |
Open Tax Year | 2005 2006 2007 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 |  |

X
- 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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- Definition Tax year that remains open to examination under enacted tax laws, in YYYY format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-15 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-3 + Details
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