Note 1 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 24, 2022	Sep. 30, 2023	Sep. 24, 2022
Net sales	$ 150,804	$ 206,687	$ 499,096	$ 621,670
Malaysia [Member]
Net sales	23,550	24,060	78,703	73,033
PHILIPPINES
Net sales	19,983	38,852	77,132	84,799
CHINA
Net sales	19,689	31,477	69,193	116,715
UNITED STATES
Net sales	23,604	19,510	58,097	62,826
Rest of the World [Member]
Net sales	63,978	92,788	215,971	284,297
Systems [Member]
Net sales	73,173	120,672	263,469	369,972
Non-systems [Member]
Net sales	$ 77,631	$ 86,015	$ 235,627	$ 251,698