Note 1 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2025	Jun. 29, 2024	Jun. 28, 2025	Jun. 29, 2024
Net sales	$ 107,680	$ 104,701	$ 204,477	$ 212,315
CHINA
Net sales	16,971	19,072	31,099	30,816
MALAYSIA
Net sales	10,847	13,791	29,009	30,690
PHILIPPINES
Net sales	15,803	9,708	28,989	21,550
TAIWAN
Net sales	22,581	6,242	28,868	11,431
UNITED STATES
Net sales	7,988	17,173	16,744	31,815
SINGAPORE
Net sales	5,258	12,929	10,135	24,993
Rest of the World [Member]
Net sales	28,232	25,786	59,633	61,020
Systems [Member]
Net sales	39,643	35,272	75,285	72,583
Non-systems [Member]
Net sales	$ 68,037	$ 69,429	$ 129,192	$ 139,732