Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2024
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Basis of Consolidation. The accompanying condensed consolidated financial statements include the accounts of the Company and its direct and indirect wholly-owned subsidiaries. All intercompany transactions have been eliminated in consolidation.
Fiscal Period, Policy [Policy Text Block]	Fiscal Year. The Company uses a 52-53 week fiscal year ending on the Sunday closest to December 31. The three months ended March 31, 2024 and April 2, 2023 each contained thirteen weeks. The 2024 fiscal year will end December 29, 2024 and will contain 52 weeks.
Basis of Presentation, Policy [Policy Text Block]	Basis of Presentation. The unaudited condensed consolidated financial statements as of and for the three months ended March 31, 2024 and April 2, 2023 have been prepared without an audit pursuant to the rules and regulations of the Securities and Exchange Commission and do not include certain of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements. In the opinion of management, all normal and recurring adjustments considered necessary for a fair presentation of such unaudited condensed consolidated financial statements have been included. The results of operations for the three months ended March 31, 2024 are not necessarily indicative of the results to be expected for the full year. These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2023. The December 31, 2023 consolidated balance sheet data is derived from those audited consolidated financial statements.
Use of Estimates, Policy [Policy Text Block]	Use of Estimates. The preparation of the unaudited condensed consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the unaudited condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. Significant items subject to such estimates include accrued occupancy costs, insurance liabilities, lease accounting matters, the valuation of acquired assets and liabilities, interest rate swap valuation, the valuation of deferred income tax assets and liabilities, and the evaluation for impairment of goodwill, long-lived assets and franchise rights. Actual results could differ from those estimates.
Segment Reporting, Policy [Policy Text Block]	Segment Information. Operating segments are components of an entity for which discrete financial information is available and is regularly reviewed by the chief operating decision maker in order to allocate resources and assess performance. The Company's chief operating decision-maker, our President and Chief Executive Officer ("CEO"), currently evaluates the Company's operations from a number of different operational perspectives; however, resource allocation decisions are determined based on the chief operating decision-maker's evaluation of the total Company operations. The Company derives all significant revenues from a single operating segment, its restaurant business. Accordingly, the Company views the operating results of its restaurants as one reportable segment.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Cash Equivalents. The Company considers all highly liquid investments with an original maturity of three months or less when purchased to be cash equivalents. The Company had $26.3 million of cash invested in money market funds classified as cash equivalents on the condensed consolidated balance sheets as of March 31, 2024. At December 31, 2023, the Company had $5.5 million of cash invested in money market funds classified as cash equivalents on the condensed consolidated balance sheets.
Food, Beverage And Packaging Costs	Food, Beverage and Packaging Costs. The Company includes food, beverage and packaging costs and delivery charges, net of any vendor purchase discounts and rebates, in food, beverage, and packaging costs.
Fair Value of Financial Instruments, Policy [Policy Text Block]	Fair Value of Financial Instruments. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants on the measurement date. In determining fair value, the accounting standards establish a three-level hierarchy for inputs used in measuring fair value as follows: Level 1 inputs are quoted prices in active markets for identical assets or liabilities; Level 2 inputs are observable for the asset or liability, either directly or indirectly, including quoted prices in active markets for similar assets or liabilities; and Level 3 inputs are unobservable and reflect the Company's own assumptions. Financial instruments include cash and cash equivalents, trade and other receivables, accounts payable and long-term debt. The carrying amounts of cash and cash equivalents, trade and other receivables and accounts payable approximate fair value because of the short-term nature of these financial instruments. Borrowings under the Company's Senior Credit Facilities (including its term B loans) accrue interest at a floating rate tied to a standard short-term borrowing index selected at the Company's option, plus an applicable margin. The Company's liability for its Senior Credit Facilities and 5.875% Senior Notes due 2029 are carried at historical cost in the accompanying balance sheets. The fair value of our term B loans and 5.875% Senior Notes due 2029 is based on recent trading activity, which are Level 2 inputs in the fair value hierarchy. As of March 31, 2024, the term B loans traded at 100.0% of par value and the 5.875% Senior Notes due 2029 traded at 101.3% of par value. The Company recognizes its derivative arrangements on the balance sheet at fair value, which is considered a Level 2 input. The Company's only derivative is an interest rate swap (the "Swap") which is designated as a cash flow hedge. Accordingly, the entire change in the fair value of the cash flow hedges included in the assessment of hedge effectiveness is recognized in accumulated other comprehensive income (loss) until the hedged item is recognized in earnings. Any ineffective portion of the changes in the fair value of this arrangement is immediately recognized in earnings as interest expense, as applicable. The Company classifies cash inflows and outflows from derivatives within operating activities on the condensed consolidated statements of cash flows. The Swap had an asset value of $4.9 million and $5.1 million as of March 31, 2024 and December 31, 2023, respectively, and is classified as Level 2 within the fair value hierarchy. Fair value measurements of non-financial assets and non-financial liabilities are primarily used in the impairment analysis of long-lived assets, goodwill and intangible assets. Long-lived assets and definite-lived intangible assets are measured at fair value on a nonrecurring basis using Level 3 inputs. As described in Note 4, the Company recorded long-lived asset impairment charges of $1.0 million during the three months ended March 31, 2024 and $0.1 million during the three months ended April 2, 2023. Impairment of Long-Lived Assets and Other Lease Charges. The Company reviews its long-lived assets, principally property and equipment, for impairment at the restaurant level. If an indicator of impairment exists for any of its assets, an estimate of the undiscounted future cash flows over the life of the primary asset for each restaurant is compared to that long-lived asset's carrying value. If the carrying value is greater than the undiscounted cash flow, the Company then determines the fair value of the asset and if an asset is determined to be impaired, the loss is measured by the excess of the carrying amount of the asset over its fair value. For closed restaurant locations, the Company reviews the future minimum lease payments and related ancillary costs from the date of the restaurant closure to the end of the remaining lease term and records a lease charge for any right-of-use ("ROU") lease asset impairment or lease-related costs during the remaining term, net of any estimated sublease recoveries. The Company determined the fair value of restaurant equipment, for those restaurants reviewed for impairment, based on current economic conditions. The Company determines the fair value of ROU lease assets based on an assessment of market rents and a discounted future cash flow model. The Company re-evaluates the ROU lease asset at the time the restaurant is no longer determined to be usable to the Company, which is generally when the restaurant is closed. These fair value asset measurements rely on significant unobservable inputs and are considered Level 3 in the fair value hierarchy.
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Issued Accounting Pronouncements. In November 2023, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. The amendments in this update require disclosure of incremental segment information and the title and position of the chief operating decision maker ("CODM"). The Company will be required to disclose significant segment expenses that are regularly provided to the CODM, as well as additional information on segment profit and loss measures and how such information is used by the CODM to assess segment performance and allocate resources. The ASU is effective for fiscal years beginning after December 15, 2023, and interim periods for fiscal years beginning after December 15, 2024, on a retrospective basis. Early adoption is permitted. The Company is currently evaluating the impact of adopting this ASU on its disclosures. In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. The amendments in this update require enhanced income tax disclosures, particularly related to a reporting entity's effective tax rate reconciliation and income taxes paid. For the rate reconciliation table, the update requires additional categories of information about federal, state, and foreign taxes and details about significant reconciling items, subject to a quantitative threshold. Income taxes paid must be similarly disaggregated by federal, state, and foreign based on a quantitative threshold. The ASU is effective for fiscal years beginning after December 15, 2024. The guidance shall be applied on a prospective basis with the option to apply retrospectively. Early adoption is permitted. The Company is currently evaluating the impact of adopting this ASU on its disclosures.
Subsequent Events, Policy [Policy Text Block]	Subsequent Events. The Company reviewed and evaluated subsequent events through the issuance date of the Company's unaudited condensed consolidated financial statements.

Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2024

Consolidation, Policy [Policy Text Block]

Basis of Consolidation. The accompanying condensed consolidated financial statements include the accounts of the Company and its direct and indirect wholly-owned subsidiaries. All intercompany transactions have been eliminated in consolidation.

Fiscal Period, Policy [Policy Text Block]

Fiscal Year. The Company uses a 52-53 week fiscal year ending on the Sunday closest to December 31. The three months ended March 31, 2024 and April 2, 2023 each contained thirteen weeks. The 2024 fiscal year will end December 29, 2024 and will contain 52 weeks.

Basis of Presentation, Policy [Policy Text Block]

Basis of Presentation. The unaudited condensed consolidated financial statements as of and for the three months ended March 31, 2024 and April 2, 2023 have been prepared without an audit pursuant to the rules and regulations of the Securities and Exchange Commission and do not include certain of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements. In the opinion of management, all normal and recurring adjustments considered necessary for a fair presentation of such unaudited condensed consolidated financial statements have been included. The results of operations for the three months ended March 31, 2024 are not necessarily indicative of the results to be expected for the full year.

These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2023. The December 31, 2023 consolidated balance sheet data is derived from those audited consolidated financial statements.

Use of Estimates, Policy [Policy Text Block]

Use of Estimates. The preparation of the unaudited condensed consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the unaudited condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. Significant items subject to such estimates include accrued occupancy costs, insurance liabilities, lease accounting matters, the valuation of acquired assets and liabilities, interest rate swap valuation, the valuation of deferred income tax assets and liabilities, and the evaluation for impairment of goodwill, long-lived assets and franchise rights. Actual results could differ from those estimates.

Segment Reporting, Policy [Policy Text Block]

Segment Information. Operating segments are components of an entity for which discrete financial information is available and is regularly reviewed by the chief operating decision maker in order to allocate resources and assess performance. The Company's chief operating decision-maker, our President and Chief Executive Officer ("CEO"), currently evaluates the Company's operations from a number of different operational perspectives; however, resource allocation decisions are determined based on the chief operating decision-maker's evaluation of the total Company operations. The Company derives all significant revenues from a single operating segment, its restaurant business. Accordingly, the Company views the operating results of its restaurants as one reportable segment.

Cash and Cash Equivalents, Policy [Policy Text Block]

Cash and Cash Equivalents. The Company considers all highly liquid investments with an original maturity of three months or less when purchased to be cash equivalents. The Company had $26.3 million of cash invested in money market funds classified as cash equivalents on the condensed consolidated balance sheets as of March 31, 2024. At December 31, 2023, the Company had $5.5 million of cash invested in money market funds classified as cash equivalents on the condensed consolidated balance sheets.

Food, Beverage And Packaging Costs

Food, Beverage and Packaging Costs. The Company includes food, beverage and packaging costs and delivery charges, net of any vendor purchase discounts and rebates, in food, beverage, and packaging costs.

Fair Value of Financial Instruments, Policy [Policy Text Block]

Fair Value of Financial Instruments. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants on the measurement date. In determining fair value, the accounting standards establish a three-level hierarchy for inputs used in measuring fair

value as follows: Level 1 inputs are quoted prices in active markets for identical assets or liabilities; Level 2 inputs are observable for the asset or liability, either directly or indirectly, including quoted prices in active markets for similar assets or liabilities; and Level 3 inputs are unobservable and reflect the Company's own assumptions. Financial instruments include cash and cash equivalents, trade and other receivables, accounts payable and long-term debt. The carrying amounts of cash and cash equivalents, trade and other receivables and accounts payable approximate fair value because of the short-term nature of these financial instruments. Borrowings under the Company's Senior Credit Facilities (including its term B loans) accrue interest at a floating rate tied to a standard short-term borrowing index selected at the Company's option, plus an applicable margin. The Company's liability for its Senior Credit Facilities and 5.875% Senior Notes due 2029 are carried at historical cost in the accompanying balance sheets. The fair value of our term B loans and 5.875% Senior Notes due 2029 is based on recent trading activity, which are Level 2 inputs in the fair value hierarchy. As of March 31, 2024, the term B loans traded at 100.0% of par value and the 5.875% Senior Notes due 2029 traded at 101.3% of par value.

The Company recognizes its derivative arrangements on the balance sheet at fair value, which is considered a Level 2 input. The Company's only derivative is an interest rate swap (the "Swap") which is designated as a cash flow hedge. Accordingly, the entire change in the fair value of the cash flow hedges included in the assessment of hedge effectiveness is recognized in accumulated other comprehensive income (loss) until the hedged item is recognized in earnings. Any ineffective portion of the changes in the fair value of this arrangement is immediately recognized in earnings as interest expense, as applicable. The Company classifies cash inflows and outflows from derivatives within operating activities on the condensed consolidated statements of cash flows. The Swap had an asset value of $4.9 million and $5.1 million as of March 31, 2024 and December 31, 2023, respectively, and is classified as Level 2 within the fair value hierarchy.

Fair value measurements of non-financial assets and non-financial liabilities are primarily used in the impairment analysis of long-lived assets, goodwill and intangible assets. Long-lived assets and definite-lived intangible assets are measured at fair value on a nonrecurring basis using Level 3 inputs. As described in Note 4, the Company recorded long-lived asset impairment charges of $1.0 million during the three months ended March 31, 2024 and $0.1 million during the three months ended April 2, 2023.

Impairment of Long-Lived Assets and Other Lease Charges. The Company reviews its long-lived assets, principally property and equipment, for impairment at the restaurant level. If an indicator of impairment exists for any of its assets, an estimate of the undiscounted future cash flows over the life of the primary asset for each restaurant is compared to that long-lived asset's carrying value. If the carrying value is greater than the undiscounted cash flow, the Company then determines the fair value of the asset and if an asset is determined to be impaired, the loss is measured by the excess of the carrying amount of the asset over its fair value. For closed restaurant locations, the Company reviews the future minimum lease payments and related ancillary costs from the date of the restaurant closure to the end of the remaining lease term and records a lease charge for any right-of-use ("ROU") lease asset impairment or lease-related costs during the remaining term, net of any estimated sublease recoveries.

The Company determined the fair value of restaurant equipment, for those restaurants reviewed for impairment, based on current economic conditions. The Company determines the fair value of ROU lease assets based on an assessment of market rents and a discounted future cash flow model. The Company re-evaluates the ROU lease asset at the time the restaurant is no longer determined to be usable to the Company, which is generally when the restaurant is closed. These fair value asset measurements rely on significant unobservable inputs and are considered Level 3 in the fair value hierarchy.

New Accounting Pronouncements, Policy [Policy Text Block]

Recently Issued Accounting Pronouncements. In November 2023, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. The amendments in this update require disclosure of incremental segment information and the title and position of the chief operating decision maker ("CODM"). The Company will be required to disclose significant segment expenses that are regularly provided to the CODM, as well as additional information on segment profit and loss measures and how such information is used by the CODM to assess segment performance and allocate resources. The ASU is effective for fiscal years beginning after December 15, 2023, and

interim periods for fiscal years beginning after December 15, 2024, on a retrospective basis. Early adoption is permitted. The Company is currently evaluating the impact of adopting this ASU on its disclosures.

In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. The amendments in this update require enhanced income tax disclosures, particularly related to a reporting entity's effective tax rate reconciliation and income taxes paid. For the rate reconciliation table, the update requires additional categories of information about federal, state, and foreign taxes and details about significant reconciling items, subject to a quantitative threshold. Income taxes paid must be similarly disaggregated by federal, state, and foreign based on a quantitative threshold. The ASU is effective for fiscal years beginning after December 15, 2024. The guidance shall be applied on a prospective basis with the option to apply retrospectively. Early adoption is permitted. The Company is currently evaluating the impact of adopting this ASU on its disclosures.

Subsequent Events, Policy [Policy Text Block]

Subsequent Events. The Company reviewed and evaluated subsequent events through the issuance date of the Company's unaudited condensed consolidated financial statements.