Note 2 - Business Acquisitions, Goodwill and Purchased Intangible Assets - Changes in Carrying Value of Goodwill (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2023		Dec. 31, 2022
Beginning balance	$ 213,539	[1]	$ 219,791
Impact of currency exchange	(1,610)		(6,252)
Additions	8,755
Ending balance	$ 220,684		$ 213,539	[1]

[1] Derived from December 31, 2022 audited financial statements