Note 4 - Restructuring Charges - Charges Related to the Wind Down Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2024	Dec. 30, 2023	Dec. 31, 2022
Restructuring Charges	$ 41	$ 2,421	$ 605
MCT Integration Program [Member]
Restructuring Charges		2,421
Xcerra Integration Program [Member]
Restructuring Charges	(465)	(62)	151
Employee Severance [Member] | MCT Integration Program [Member]
Restructuring Charges		2,159
Balance	68	0
Amounts paid or charged		(2,091)
Balance		68	0
Employee Severance [Member] | Xcerra Integration Program [Member]
Restructuring Charges	0	0	(8)
Balance		0	348
Amounts paid or charged			(331)
Balance			0
Impact of currency exchange			(9)
Other Restructuring [Member] | MCT Integration Program [Member]
Restructuring Charges		262
Balance	0	0
Amounts paid or charged		(262)
Balance		0	0
Other Restructuring [Member] | Xcerra Integration Program [Member]
Restructuring Charges	0	0	613
Balance		0	0
Amounts paid or charged			(613)
Balance			0
Impact of currency exchange			0
Employee Severance and Other Exit Costs [Member] | MCT Integration Program [Member]
Restructuring Charges		2,421
Balance	68	0
Amounts paid or charged		(2,353)
Balance		68	0
Employee Severance and Other Exit Costs [Member] | Xcerra Integration Program [Member]
Restructuring Charges			605
Balance		0	348
Amounts paid or charged			(944)
Balance			0
Impact of currency exchange			(9)
Inventory Charges [Member] | Xcerra Integration Program [Member]
Restructuring Charges	$ (465)	$ (62)	$ (454)