Note 5 - Goodwill and Intangible Assets - Changes in Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Balance	$ 21,728	$ 21,605
Impact of foreign currency translation adjustments	(867)	123
Balance - December 31, 2022	30,744	$ 21,728
Alfamation [Member]
Alfamation acquisition (Electronic Test segment)	9,883
Balance - December 31, 2022	$ 9,883