Note 5 - Income Taxes - Components of Provision (Benefit) for Income Taxes for Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
U.S. Federal	$ 12	$ 11	$ 5
U.S. State	18	8	28
Foreign	6,005	3,793	1,956
Total current	6,035	3,812	1,989
U.S. Federal	(3,451)	91	89
U.S. State	(481)	47	49
Foreign	141	(1,203)	84
Total deferred	(3,791)	(1,065)	222
	$ 2,244	$ 2,747	$ 2,211