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Supplemental Financial Information (Net Sales By Country) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2026	Sep. 27, 2025	Sep. 26, 2026	Sep. 27, 2025
Concentration Risk [Line Items]
Net sales	$ 105,104	$ 42,234	$ 319,841	$ 112,915
Deferred revenue	258,000		258,000
Net product sales
Concentration Risk [Line Items]
Net sales	60,194	42,234	274,931	112,915
Deferred revenue	30,500		30,500
License fee
Concentration Risk [Line Items]
Net sales	44,910		44,910
Deferred revenue	227,500		227,500
License fee \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-09-27
Concentration Risk [Line Items]
Deferred revenue	$ 47,900		$ 47,900
Deferred revenue recognized	12 months		12 months
United States
Concentration Risk [Line Items]
Net sales	$ 27,799	3,618	$ 53,294	7,446
People's Republic of China
Concentration Risk [Line Items]
Net sales	12,479	36,112	167,362	101,129
MALAYSIA
Concentration Risk [Line Items]
Net sales	14,902	1,026	45,291	1,777
Republic of Korea
Concentration Risk [Line Items]
Net sales	44,910		44,910
Other countries
Concentration Risk [Line Items]
Net sales	$ 5,014	$ 1,478	$ 8,984	$ 2,563
Sales Revenue, Product Line [Member] \| Customer Concentration Risk [Member] \| License fee
Concentration Risk [Line Items]
Concentration risk, percentage	43.00%		14.00%
Sales Revenue, Product Line [Member] \| Customer Concentration Risk [Member] \| Republic of Korea \| Minimum
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%