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Note 6 - Income Taxes (Details Textual) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Effective Income Tax Rate Reconciliation, Percent	20.90%	29.20%
Unrecognized Tax Benefits, Ending Balance	$ 0		$ 0
Domestic Tax Jurisdiction [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards			27,200
Tax Credit Carryforward, Amount			$ 2,900
Open Tax Year	2005 2006 2007 2009 2011 2012 2013 2014 2015
Foreign Tax Jurisdiction [Member]
Deferred Tax Assets, Valuation Allowance	$ 0
Foreign Tax Jurisdiction [Member] | His Majesty's Revenue and Customs (HMRC) [Member]
Operating Loss Carryforwards	$ 9,800
State and Local Jurisdiction [Member]
Open Tax Year	2013 2014 2015 2019 2020 2021 2022
Foreign Tax Jurisdiction, Other [Member]
Open Tax Year	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

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Tax year that remains open to examination under enacted tax laws, in YYYY format.

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