Note 12 - Taxes on Income - Provisions for Taxes on Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Federal	$ (1,683)	$ (3,116)	$ (4,902)
Foreign	5,010	5,705	6,025
State	794	49	(722)
Subtotal	4,121	2,638	401
Federal	(421)	(994)	58
Foreign	704	(199)	(1,531)
State	863	2,565	(221)
Subtotal	1,146	1,372	(1,694)
Total tax provision	$ 5,267	$ 4,010	$ (1,293)