Note 14 - Accumulated Other Comprehensive Loss - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Foreign currency translation adjustment, net of taxes of ($260) at September 30, 2023 and ($369) at December 31, 2022	$ (25,964)	$ (23,107)
Unrealized gains on interest rate swap cash flow hedge, net of taxes of $0 at September 30, 2023 and $0 at December 31, 2022	5,530	5,539
Unrealized holding gains on marketable securities, net of taxes of ($7) at September 30, 2023 and ($7) at December 31, 2022	19	18
Unfunded SERP liability, net of taxes of $891 at September 30, 2023 and $879 at December 31, 2022	1,045	1,004
Accumulated other comprehensive loss	$ (19,370)	$ (16,546)

Amount, after tax, of accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

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Amount, after tax, of accumulated increase (decrease) in equity from transaction and other event and circumstance from nonowner source.

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Amount, after tax, of accumulated gain (loss) on derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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