Earnings (Loss) per share - Schedule of Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 28, 2024	Dec. 30, 2023
Continuing Operations
Net (loss) income from continuing operations, basic	$ (6,245)	$ (17,095)
Weighted average common shares outstanding, diluted (in shares)	11,148,493	4,444,361
Basic (loss) income per share from continuing operations (in usd per share)	$ (0.56)	$ (4.27)
Net (loss) income from continuing operations, diluted	$ (6,245)	$ (17,095)
Weighted average common shares outstanding, basic (in shares)	11,148,493	4,005,334
Diluted (loss) per share from continuing operations (in usd per share)	$ (0.56)	$ (4.27)
Discontinued Operations
Net income from discontinued operations, basic	$ 0	$ 9,283
Weighted average common shares outstanding, basic (in shares)	11,148,493	4,005,334
Basic income per share from discontinued operations (in usd per share)	$ 0	$ 2.32
Net income from discontinued operations, diluted	$ 0	$ 9,283
Weighted average common shares outstanding, diluted (in shares)	11,148,493	4,444,361
Diluted income per share from discontinued operations (in usd per share)	$ 0	$ 2.09
Basic
Net (loss) income, basic	$ (6,245)	$ (7,812)
Weighted average common shares outstanding, basic (in shares)	11,148,493	4,005,334
Basic (loss) income per share (in usd per share)	$ (0.56)	$ (1.95)
Diluted
Net (loss) income, diluted	$ (6,245)	$ (7,812)
Weighted average common shares outstanding, diluted (in shares)	11,148,493	4,444,361
Net (loss) income per share, diluted (in usd per share)	$ (0.56)	$ (1.95)