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Investments Available for Sale - Summary of Investments Available for Sale and Related Fair Value Measurement (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 26, 2025	Dec. 27, 2024
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 16,504	$ 86,346
Unrealized Gains	3	21
Unrealized Losses	(2)	(32)
Estimated Fair Value	16,505	86,335
Fair Value, Inputs, Level 1
Schedule Of Available For Sale Securities [Line Items]
Fair Value Measurements		11,355
Fair Value, Inputs, Level 2
Schedule Of Available For Sale Securities [Line Items]
Fair Value Measurements	16,505	74,980
Commercial Paper
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	14,373	21,466
Unrealized Gains	2	4
Unrealized Losses	(2)	(2)
Estimated Fair Value	14,373	21,468
Commercial Paper | Fair Value, Inputs, Level 2
Schedule Of Available For Sale Securities [Line Items]
Fair Value Measurements	14,373	21,468
Certificates of Deposit
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	1,524	1,997
Unrealized Gains	1
Estimated Fair Value	1,525	1,997
Certificates of Deposit | Fair Value, Inputs, Level 2
Schedule Of Available For Sale Securities [Line Items]
Fair Value Measurements	1,525	1,997
U.S. Treasury Securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost		11,356
Unrealized Gains		3
Unrealized Losses		(4)
Estimated Fair Value		11,355
U.S. Treasury Securities | Fair Value, Inputs, Level 1
Schedule Of Available For Sale Securities [Line Items]
Fair Value Measurements		11,355
Corporate Debt Securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	607	51,527
Unrealized Gains	0	14
Unrealized Losses	0	(26)
Estimated Fair Value	607	51,515
Corporate Debt Securities | Fair Value, Inputs, Level 2
Schedule Of Available For Sale Securities [Line Items]
Fair Value Measurements	$ 607	$ 51,515

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