Note 4 - Restructuring Charges - Charges Related to the Wind Down Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022	Dec. 25, 2021
Costs accrued	$ 2,421	$ 605	$ 1,823
MCT Integration Program [Member]
Restructuring Expenses	2,421
Xcerra Integration Program [Member]
Restructuring Expenses	(62)	151	1,265
Costs accrued	(100)	200	1,300
Employee Severance [Member] | MCT Integration Program [Member]
Restructuring Expenses	2,159
Employee Severance [Member] | Integration Program [Member]
Accrued restructuring, balance	0
Costs accrued	2,159
Amounts paid or charged	(2,091)
Impact of currency exchange	0
Accrued restructuring, balance	68	0
Employee Severance [Member] | Xcerra Integration Program [Member]
Restructuring Expenses	0	(8)	1,161
Accrued restructuring, balance	0	348	5,826
Costs accrued		(8)	1,161
Amounts paid or charged		(331)	(6,545)
Impact of currency exchange		(9)	(94)
Accrued restructuring, balance		0	348
Other Restructuring [Member] | MCT Integration Program [Member]
Restructuring Expenses	262
Other Restructuring [Member] | Integration Program [Member]
Accrued restructuring, balance	0
Costs accrued	262
Amounts paid or charged	(262)
Impact of currency exchange	0
Accrued restructuring, balance	0	0
Other Restructuring [Member] | Xcerra Integration Program [Member]
Restructuring Expenses	0	613	662
Accrued restructuring, balance	0	0	0
Costs accrued		613	662
Amounts paid or charged		(613)	(662)
Impact of currency exchange		0	0
Accrued restructuring, balance		0	0
Employee Severance and Other Exit Costs [Member] | Integration Program [Member]
Accrued restructuring, balance	0
Costs accrued	2,421
Amounts paid or charged	(2,353)
Impact of currency exchange	0
Accrued restructuring, balance	68	0
Employee Severance and Other Exit Costs [Member] | Xcerra Integration Program [Member]
Accrued restructuring, balance	0	348	5,826
Costs accrued		605	1,823
Amounts paid or charged		(944)	(7,207)
Impact of currency exchange		(9)	(94)
Accrued restructuring, balance		0	348
Inventory Charges [Member] | Xcerra Integration Program [Member]
Restructuring Expenses	$ (62)	$ (454)	$ (558)