Income taxes - Schedule of Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2024	Dec. 30, 2023
Income Tax Contingency [Line Items]
Income tax benefit	$ (3,041)	$ (429)
Current tax expense:
State	(102)	0
Federal	(44)	98
Foreign	334	0
Current tax expense	188	98
Deferred tax (benefit) provision	(3,229)	444
Total (benefit) provision of income taxes	(3,041)	542
Continuing Operations
Income Tax Contingency [Line Items]
Income tax benefit	(3,000)
Discontinued operations
Income Tax Contingency [Line Items]
Income tax benefit	$ 0	$ 1,000