Income taxes - Schedule of Components of Net Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands	Dec. 28, 2024	Dec. 30, 2023
Deferred tax assets (liabilities):
Accrued expenses	$ 152	$ 7
Allowance for bad debts	53	0
Accrued compensation	35	3
Section 174 expenses	43	61
Prepaid expenses	(128)	(16)
Net operating loss	7,586	5,360
Lease liability	33	0
Tax credits	0	3
Share-based compensation	114	136
Intangibles	(6,909)	(3,747)
Right-of-use assets	(33)	0
Installment sale	0	0
Unrealized losses	794	327
Section 163(j) interest	138	0
Total deferred tax assets (liabilities)	1,878	2,134
Less: valuation allowance	(2,919)	(2,773)
Net deferred tax liabilities	$ (1,041)	$ (639)