Income Taxes - Reconciliation of Income Tax Provision (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Dec. 25, 2022
Income Tax Disclosure [Abstract]
Income tax (benefit) at federal statutory rate	$ 5.6	$ 2.3	$ (6.9)
State taxes (benefit), net of federal tax benefit and valuation allowance	1.9	3.7	(0.3)
Difference in tax rates between U.S. and foreign	2.6	1.7	(0.2)
Increase (decrease) in valuation allowance	(4.2)	(2.0)	4.9
Nondeductible expense	0.5	0.5	0.5
Increase (decrease) in reserve for uncertain tax positions	0.3	0.3	(0.9)
Other	0.9	0.1	0.2
Officer’s compensation 162(m) limitation	0.8	0.5	1.0
R&D tax credit	(0.9)	(0.9)	(0.9)
Stock-based compensation	2.7	2.5	2.8
Total	$ 10.2	$ 8.7	$ 0.2