Note 4 - Restructuring Charges - Charges Related to the Wind Down Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Costs accrued	$ 605	$ 1,823	$ 7,623
Integration Program [Member]
Restructuring Charges, Total	151	1,265	11,354
Costs accrued	200	1,300	11,400
Employee Severance [Member] | Integration Program [Member]
Restructuring Charges, Total	(8)	1,161	6,485
Accrued restructuring, balance	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	5,826
Other Restructuring [Member] | Integration Program [Member]
Restructuring Charges, Total	613	662	1,138
Accrued restructuring, balance	0	0
Costs accrued	613	662
Amounts paid or charged	(613)	(662)
Impact of currency exchange	0	0
Accrued restructuring, balance	0	0	0
Employee Severance and Other Exit Costs [Member] | Integration Program [Member]
Accrued restructuring, balance	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	5,826
Inventory Charges [Member] | Integration Program [Member]
Restructuring Charges, Total	$ (454)	$ (558)	$ 3,731