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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