Income Taxes Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 25, 2021
Income Tax Disclosure [Abstract]
Federal statutory rate	21.00%	21.00%
Statutory rate applied to income (loss) from continuing operations before taxes	$ (7,035)	$ 1,104
Plus state income taxes, net of federal tax effect	43	81
Total statutory provision (benefit)	(6,992)	1,185
Nondeductible meals and entertainment	0	1
Executive compensation limitation	55	37
Federal tax credits	(279)	(227)
State tax credits	(11)	0
Reserve for uncertain tax positions	24	7
Change in valuation allowance	7,103	(857)
Stock-based compensation	66	(18)
Other items	(53)	(23)
Income tax provision (benefit)	$ (87)	$ 105

Effective Income Tax Rate Reconciliation, Nondeductible Expense, Compensation Limitation, Amount

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Effective Income Tax Rate Reconciliation, State Tax Credit, Amount

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Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal and State Statutory Income Tax Rates

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for award under share-based payment arrangement. Includes, but is not limited to, expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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