Basis of Presentation and Significant Accounting Policies - Additional Information (Details)	3 Months Ended		12 Months Ended
	Mar. 28, 2025 USD ($) Property	Mar. 29, 2024 USD ($)	Dec. 27, 2024 USD ($)
Organization And Description Of Business And Accounting Policies [Line Items]
Capitalized cloud-based software implementation costs	$ 17,930,000		$ 15,763,000
Capitalized Computer Software, Amortization	53,000	$ 0
Severance costs recognized	8,808,000
Impairment on real property right-of-use assets	$ 3,407,000
Number of leased properties looking for subleases | Property	2
Impairement of developed software	$ 2,751,000
Restructuring, impairment and related charges	$ 22,664,000
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]	srt:ChiefExecutiveOfficerMember
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description	The CODM assesses performance by comparing actual results to forecasts and decides how to allocate resources, i.e., headcount and compensation, based on consolidated net loss.
Leasehold Improvements
Organization And Description Of Business And Accounting Policies [Line Items]
Recognized cost	$ 7,059,000
Machinery and Equipment
Organization And Description Of Business And Accounting Policies [Line Items]
Recognized cost	7,059,000
Cloud Based Software
Organization And Description Of Business And Accounting Policies [Line Items]
Capitalized cloud-based software implementation costs	1,256,000
Reduction in Workforce, and Consulting Expenses
Organization And Description Of Business And Accounting Policies [Line Items]
Severance costs recognized	$ 9,447,000
Maximum | Consolidated Accounts Payable | Vendor Concentration Risk
Organization And Description Of Business And Accounting Policies [Line Items]
Concentration risk, percentage			10.00%