Note 15 - Business Divestitures (Details Textual) $ in Thousands			6 Months Ended	12 Months Ended
		Jun. 24, 2021 USD ($)	Dec. 25, 2021 USD ($)	Dec. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 25, 2021 USD ($)
Gain (Loss) on Disposition of Business	[1]			$ (0)	$ (0)	$ 70,815
Number of Reportable Segments		2		1		1
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | PCB Test Business [Member]
Proceeds from Sales of Business, Affiliate and Productive Assets		$ 125,100
Gain (Loss) on Disposition of Business			$ 70,800
Disposal Group, Including Discontinued Operation, Assets, Total			48,200			$ 48,200
Disposal Group, Including Discontinued Operation, Goodwill			21,900			21,900
Disposal Group, Including Discontinued Operation, Intangible Assets			$ 14,800			$ 14,800

[1] On June 24, 2021 we completed the divestment of our PCB Test business. The divestment of this business did not qualify for presentation as discontinued operations and the results of the PCB Test business are included in continuing operations for all periods presented. See Note 14, “Business Divestitures and Discontinued Operations” for additional information on this transaction and financial statement presentation.