Income Taxes Components of Deferred Tax Assets and Liabilities, Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021
Operating Loss Carryforwards [Line Items]
Federal tax credit carryforwards	$ 4,590	$ 4,136
State tax credit carryforwards	1,669	1,669
Valuation allowance	21,345	12,851
Deferred tax liabilities, net	91	$ 91
Federal Taxing Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	31,180
State Taxing Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 79,312
State Taxing Authority | Earliest Tax Year
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards and tax credit carryforwards, expiration date	2022
State Taxing Authority | Latest Tax Year
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards and tax credit carryforwards, expiration date	2042
Internal Revenue Service (IRS) | Earliest Tax Year
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards and tax credit carryforwards, expiration date	2029
Internal Revenue Service (IRS) | Latest Tax Year
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards and tax credit carryforwards, expiration date	2043