Note 13 - Accumulated Other Comprehensive Loss - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Foreign currency translation adjustment, net of taxes of ($378) at March 31, 2023 and ($369) at December 31, 2022	$ (21,109)	$ (23,107)
Unrealized gains on interest rate swap cash flow hedge, net of taxes of $0 at March 31, 2023 and $0 at December 31, 2022	4,645	5,539
Unrealized holding gains on marketable securities, net of taxes of ($7) at March 31, 2023 and ($7) at December 31, 2022	19	18
Unfunded SERP liability, net of taxes of $883 at March 31, 2023 and $879 at December 31, 2022	1,017	1,004
Accumulated other comprehensive loss	$ (15,428)	$ (16,546)