Note 10 - Segment and Geographic Information - Summary of Net Sales to Customers, Attributed to Countries (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2021	Dec. 26, 2020	Dec. 28, 2019
Net sales	$ 887,214	$ 636,007	$ 583,329
CHINA
Net sales	213,575	143,360	118,213
PHILIPPINES
Net sales	155,070	56,272	51,683
TAIWAN, PROVINCE OF CHINA
Net sales	88,152	83,685	75,725
MALAYSIA
Net sales	79,777	57,893	61,826
UNITED STATES
Net sales	77,495	108,694	71,963
Rest of the World [Member]
Net sales	$ 273,145	$ 186,103	$ 203,919