Note 2 - Business Acquisitions, Goodwill and Purchased Intangible Assets - Purchase Price Allocation (Details) - USD ($) $ in Thousands	Apr. 01, 2023	Jan. 30, 2023	Dec. 31, 2022	[1]	Dec. 25, 2021
Goodwill	$ 223,552		$ 213,539		$ 219,791
MCT Worldwide, LLC [Member]
Current assets, including cash received		$ 9,494
Property, plant and equipment		197
Other assets		356
Intangible assets		12,000
Goodwill		8,798
Total assets acquired		30,845
Liabilities assumed		(4,024)
Net assets acquired		$ 26,821

[1] Derived from December 31, 2022 audited financial statements