Note 1 - Summary of Significant Accounting Policies - Reported Share-based Compensation in Consolidated Financial Statements (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jul. 01, 2023	Jun. 25, 2022	Jul. 01, 2023	Jun. 25, 2022
Share-based compensation of continuing operations	$ 4,432	$ 3,933	$ 8,346	$ 7,355
Income tax benefit	(62)	(836)	(2,838)	(2,462)
Total share-based compensation, net	4,370	3,097	5,508	4,893
Cost of Sales [Member]
Share-based compensation of continuing operations	216	172	396	317
Research and Development Expense [Member]
Share-based compensation of continuing operations	819	826	1,685	1,578
Selling, General and Administrative Expenses [Member]
Share-based compensation of continuing operations	$ 3,397	$ 2,935	$ 6,265	$ 5,460

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479830/718-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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