Stock-Based Awards (Stock Based Compensation) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 27, 2026	Jun. 28, 2025	Jun. 27, 2026	Jun. 28, 2025
Stock-Based Awards
Stock-Based Compensation, Total	$ 809	$ 1,013	$ 1,765	$ 1,984
Unearned stock-based compensation	9,200		$ 9,200
Expects to recognize over a weighted-average period			3 years 3 months 18 days
Cost of sales
Stock-Based Awards
Stock-Based Compensation, Total	32	42	$ 47	50
Research and development
Stock-Based Awards
Stock-Based Compensation, Total	106	137	281	345
Selling, general and administrative
Stock-Based Awards
Stock-Based Compensation, Total	$ 671	$ 834	$ 1,437	$ 1,589

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 S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479983/718-10-S45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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