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Note 7 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Income Tax Expense (Benefit)	$ 1,892	$ 1,951
Operating Loss Carryforwards	1,000
Deferred Tax Assets, Valuation Allowance	2,404	$ 2,441
Unrecognized Tax Benefits, Ending Balance	0
General Business Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount	$ 3,200
Domestic Tax Jurisdiction [Member]
Open Tax Year	2002 2005 2006 2007 2009 2011 2012 2013 2014 2015 2021 2022 2023
Domestic Tax Jurisdiction [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards	$ 15,000
Open Tax Year	2002 2005 2006 2007 2009 2011 2012 2013 2014 2015 2021 2022 2023
Foreign Tax Jurisdiction [Member]
Deferred Tax Assets, Valuation Allowance	$ 0
Open Tax Year	2014 2015 2016 2017 2018 2019 2020 2021 2022 2023
Foreign Tax Jurisdiction [Member] | His Majesty's Revenue and Customs (HMRC) [Member]
Operating Loss Carryforwards	$ 9,600
State and Local Jurisdiction [Member]
Open Tax Year	2014 2015 2016 2017 2018 2019 2020 2021 2022 2023

X

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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