Note 12 - Taxes on Income - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Balance	$ 1,384	$ 1,955	$ 2,229
Additions for tax positions of prior years	51	9	8
Lapse in statute of limitations	(451)	(587)	(264)
Foreign currency translation	7	7
Foreign currency translation			(18)
Balance	$ 991	$ 1,384	$ 1,955