Note 14 - Taxes on Income - Uncertain Tax Positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Beginning of year	$ 1,037	$ 2,739
Additions for current year tax positions	387	478
Additions (reductions) for prior year’s tax positions	(134)	(16)
Additions (reductions) for prior year’s tax positions	134	16
Decrease as a result of the completion of a tax audit for prior years	0	(2,164)
Ending balance	$ 1,558	$ 1,037