CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2024	Dec. 30, 2023
Income Statement [Abstract]
Revenues	$ 12,532	$ 0
Cost of revenues	6,238	0
Gross profit	6,294	0
Operating expenses:
Selling, general and administrative expenses	13,856	4,746
Impairment charges	0	15,100
Total operating expenses	13,856	19,846
Operating loss	(7,562)	(19,846)
Other income:
Interest (expense) income, net	(879)	2,250
Realized gain on exchange transactions	374	0
Unrealized loss on marketable securities	(1,058)	(926)
Other income, net	(161)	998
Total other (expense) income, net	(1,724)	2,322
Loss before benefit from income taxes	(9,286)	(17,524)
Income tax benefit	(3,041)	(429)
Net loss from continuing operations	(6,245)	(17,095)
Income from discontinued operations	0	10,254
Income tax provision for discontinued operations	0	971
Net income from discontinued operations	0	9,283
Net loss	$ (6,245)	$ (7,812)
(Loss) income per share:
Net loss per share from continuing operations, basic (in usd per share)	$ (0.56)	$ (4.27)
Net loss per share from continuing operations, diluted (in usd per share)	(0.56)	(4.27)
Net income per share from discontinued operations, basic (in usd per share)	0	2.32
Net income per share from discontinued operations, diluted (in usd per share)	0	2.09
Net loss per share, basic (in usd per share)	(0.56)	(1.95)
Net loss per share, diluted (in usd per share)	$ (0.56)	$ (1.95)
Weighted average common shares outstanding:
Basic (in shares)	11,148,493	4,005,334
Diluted (in shares)	11,148,493	4,444,361