Note 2 - Business Acquisitions, Goodwill and Purchased Intangible Assets - Purchase Price Allocation (Details) - USD ($) $ in Thousands	Mar. 29, 2025	Jan. 07, 2025	Dec. 28, 2024	[1]	Dec. 30, 2023
Goodwill	$ 272,598		$ 234,639		$ 241,658
Tignis, Inc [Member]
Current assets, including cash received		$ 293
Property, plant and equipment		19
Other assets		56
Intangible assets		2,900
Goodwill		33,688
Total assets acquired		36,956
Liabilities assumed		(349)
Net assets acquired		$ 36,607

[1] Derived from December 28, 2024, audited financial statements