Income Taxes Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 28, 2024	Dec. 30, 2023
Deferred tax assets:
Inventories	$ 1,916	$ 1,649
Retirement benefits	436	322
State net operating losses	3,502	4,014
Federal net operating losses	6,309	2,840
State tax credit carryforwards	0	1,669
Federal tax credit carryforwards	4,778	4,579
Allowances for bad debts, claims and discounts	1,806	1,663
Other	8,597	7,246
Total deferred tax assets	27,344	23,982
Valuation allowance	(24,737)	(20,961)
Net deferred tax assets	2,607	3,021
Deferred tax liabilities:
Property, plant and equipment	2,698	3,112
Total deferred tax liabilities	2,698	3,112
Net deferred tax liability	$ (91)	$ (91)