Note 15 - Taxes on Income - Provisions for Federal, Foreign and State Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Federal	$ (3,549)	$ 10,245	$ 6,886
Foreign	14,548	11,923	12,934
State	2,628	1,414	1,633
Current expense	13,627	23,582	21,453
Federal	2,145	20,467	6,186
Foreign	(11,228)	1,214	(1,937)
State	194	2,030	(728)
Deferred expense	(8,889)	23,711	3,521
Income tax expense	$ 4,738	$ 47,293	$ 24,974