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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

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-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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-SubTopic 10
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Tax year that remains open to examination under enacted tax laws, in YYYY format.

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