Property, Plant and Equipment [Abstract] Property and Equipment Property, Plant and Equipment Disclosure [Text Block] Income Statement [Abstract] Statement [Table] Statement [Table] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Company-operated restaurant revenue Service [Member] Franchise revenue Franchise [Member] Franchise advertising fee revenue Franchise Advertising Fee [Member] Franchise Advertising Fee [Member] Statement [Line Items] Statement [Line Items] Revenue Revenues [Abstract] Total revenue Revenue from Contract with Customer, Including Assessed Tax Cost of operations Cost of Goods and Services Sold [Abstract] Food and paper cost Cost, Direct Material Labor and related expenses Cost, Direct Labor Occupancy and other operating expenses Other Cost and Expense, Operating Company restaurant expenses Company Restaurant Expenses Generally recurring costs associated with normal operations including cost of services. General and administrative expenses General and Administrative Expense Franchise expenses Franchisor Costs Depreciation and amortization Depreciation, Depletion and Amortization Loss on disposal of assets Gain (Loss) on Disposition of Assets Recovery of securities lawsuits related legal expenses Recovery of securities class action legal expense Recovery of securities class action legal expense Asset impairment and closed-store reserves Restructuring Costs and Asset Impairment Charges Total expenses Costs and Expenses Income (loss) from operations Operating Income (Loss) Interest expense, net of interest income of $14 and $6 for the quarters ended September 26, 2018 and September 27, 2017, respectively, and $29 and $17 for year-to-date ended September 26, 2018 and September 27, 2017, respectively. Interest Expense Income tax receivable agreement (income) expense Tax Receivable Agreement Expenses Tax receivable agreement expenses. Income (loss) before provision (benefit) for income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Provision (benefit) for income taxes Income Tax Expense (Benefit) Net income (loss) Net Income (Loss) Attributable to Parent Net income (loss) per share Earnings Per Share [Abstract] Basic (usd per share) Earnings Per Share, Basic Diluted (usd per share) Earnings Per Share, Diluted Weighted-average shares used in computing net income per share Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] Basic (shares) Weighted Average Number of Shares Outstanding, Basic Diluted (shares) Weighted Average Number of Shares Outstanding, Diluted Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type Award Type [Axis] Equity Award Equity Award [Domain] Premium Options Premium Options [Member] Premium options. Employee Stock Option Employee Stock Option [Member] Restricted Stock Restricted Stock [Member] Performance Shares Performance Shares [Member] Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Common stock, options outstanding (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Common stock, options vested (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares Common stock, options unvested (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares Stock options exercised (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Number of options granted at fair market value (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Unrecognized compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Unrecognized compensation expense, period for recognition Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Shares granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted Unvested restricted shares outstanding (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Unrecognized compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Accelerated vesting of awards (shares) Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number Incremental stock-based compensation expense Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost Stock-based compensation Share-based Compensation Revenue from Contract with Customer [Abstract] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Concentration Risk Benchmark Concentration Risk Benchmark [Axis] Concentration Risk Benchmark Concentration Risk Benchmark [Domain] Revenue Sales Revenue, Net [Member] Concentration Risk Type Concentration Risk Type [Axis] Concentration Risk Type Concentration Risk Type [Domain] Geographic Concentration Risk Geographic Concentration Risk [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Los Angeles Los Angeles [Member] Information pertaining to Los Angeles. Other than Los Angeles Other than Los Angeles [Member] Other than Los Angeles [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Percentage of concentration Concentration Risk, Percentage Other Liabilities, Noncurrent [Abstract] Schedule of Other Noncurrent Liabilities Other Noncurrent Liabilities [Table Text Block] Other Noncurrent Liabilities Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Noncurrent [Text Block] Schedule of Costs and Related Accumulated Depreciation and Amortization of Major Classes of Property and Equipment Property, Plant and Equipment [Table Text Block] Computation of Basic and Diluted Net Income (Loss) per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Reconciliation of Basic and Diluted Share Counts Schedule of Weighted Average Number of Shares [Table Text Block] Numerator: Net Income (Loss) Attributable to Parent [Abstract] Net income (loss) Denominator: Weighted-average shares outstanding—basic (shares) Weighted-average shares outstanding—diluted (shares) Net income (loss) per share—basic (usd per share) Net income (loss) per share—diluted (usd per share) Anti-dilutive securities not considered in diluted EPS calculation (shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Payables and Accruals [Abstract] Schedule of Other Accrued Expenses and Current Liabilities Other Current Liabilities [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Related Party Transactions [Abstract] Related Party Transactions Related Party Transactions Disclosure [Text Block] Statement of Financial Position [Abstract] Preferred stock, par value (usd per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized (shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (shares) Preferred Stock, Shares Issued Preferred stock, shares outstanding (shares) Preferred Stock, Shares Outstanding Common stock, par value (usd per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (shares) Common Stock, Shares Authorized Common stock, shares issued (shares) Common Stock, Shares, Issued Common stock, shares outstanding (shares) Common Stock, Shares, Outstanding Schedule Of Related Party Transactions By Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party Related Party [Axis] Related Party Related Party [Domain] Trimaran Pollo Partners, LLC Trimaran Pollo Partners L L C [Member] Information pertaining to Trimaran Pollo Partners, LLC. Range Range [Axis] Range Range [Domain] Minimum Minimum [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Company's outstanding common stock owned by Trimaran Pollo Partners, L.L.C. Equity Method Investment, Ownership Percentage Outstanding membership interest percentage, at least Percentage Of Membership Interests Percentage of membership interests. Ownership percentage by stockholders Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Debt Disclosure [Abstract] Debt Instrument [Table] Schedule of Long-term Debt Instruments [Table] Credit Facility Credit Facility [Axis] Credit Facility Credit Facility [Domain] Senior Secured Revolving Credit Facility Revolving Credit Facility [Member] Debt Instrument Debt Instrument [Axis] Debt Instrument, Name Debt Instrument, Name [Domain] 2014 Revolver Credit Agreement Two Thousand Fourteen [Member] Credit agreement two thousand fourteen. Credit Agreement Two Thousand Eighteen Credit Agreement Two Thousand Eighteen [Member] Credit Agreement Two Thousand Eighteen [Member] Short-term Debt, Type Short-term Debt, Type [Axis] Short-term Debt, Type Short-term Debt, Type [Domain] Letter of Credit Letter of Credit [Member] Swing Line Loans Swing Line Loans [Member] Swing line loans. Variable Rate Variable Rate [Axis] Variable Rate Variable Rate [Domain] Federal Funds Rate Federal Funds Effective Swap Rate [Member] LIBOR London Interbank Offered Rate (LIBOR) [Member] Base Rate Base Rate [Member] Maximum Maximum [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Senior secured revolving facility Line of Credit Facility, Maximum Borrowing Capacity Senior secured revolving facility term Debt Instrument, Term Sub limit of revolving facility Line of Credit Facility, Current Borrowing Capacity Revolving credit facility maturity period Debt Instrument, Maturity Date Debt instrument basis percentage Debt Instrument, Basis Spread on Variable Rate Debt instrument, interest rate Line of Credit Facility, Interest Rate During Period Letters of credit outstanding Letters of Credit Outstanding, Amount Revolver loan Long-term Line of Credit, Noncurrent Amount of borrowings available Line of Credit Facility, Remaining Borrowing Capacity Gross payments on outstanding borrowings Debt Instrument, Periodic Payment Payments made on new borrowings Debt Instrument, Periodic Payment On New Borrowings Debt Instrument, Periodic Payment On New Borrowings Principal payments prior to maturity Debt Instrument, Periodic Payment, Principal Accounting Policies [Abstract] Basis Of Presentation And Summary Of Significant Accounting Policies [Table] Basis Of Presentation And Summary Of Significant Accounting Policies [Table] Basis of presentation and summary of significant accounting policies table. Franchisor Disclosure Franchisor Disclosure [Axis] Franchisor Disclosure Franchisor Disclosure [Domain] Entity Operated Units Entity Operated Units [Member] Franchised Units Franchised Units [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Company Operated Properties Company Operated Properties [Member] Company Operated Properties [Member] TEXAS TEXAS ARIZONA ARIZONA CALIFORNIA CALIFORNIA Range [Axis] Range [Domain] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Fair Value, Inputs, Level 1 Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 2 Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 Fair Value, Inputs, Level 3 [Member] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Nonrecurring Fair Value, Measurements, Nonrecurring [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Supplier Concentration Risk Supplier Concentration Risk [Member] Supplier [Axis] Supplier [Axis] Share-based Goods and Nonemployee Services Transaction, Supplier [Domain] Share-based Goods and Nonemployee Services Transaction, Supplier [Domain] Supplier One Supplier One [Member] Supplier one. Largest Supplier One Largest Supplier One [Member] Largest supplier one. Accounts Payable Accounts Payable [Member] Purchased Purchased [Member] Purchased. Asset Class Asset Class [Axis] Asset Class Asset Class [Domain] Indefinite-lived Intangible Assets Indefinite-lived Intangible Assets [Member] Property, Plant and Equipment Property, Plant and Equipment [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Franchise license Franchise Rights [Member] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] Calculated under Revenue Guidance in Effect before Topic 606 Calculated under Revenue Guidance in Effect before Topic 606 [Member] Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] Basis of presentation and summary of significant accounting policies. Number of operating segments Number of Operating Segments Number of restaurants Number of Restaurants Restricted dividend payments, description Restriction to Transfer Funds Restrictive covenants, maximum annual repurchase or redemption of qualified entity interests, up to Debt Instrument, Restrictive Covenants, Maximum Annual Repurchase or Redemption of Qualified Entity Interests Debt Instrument, Restrictive Covenants, Maximum Annual Repurchase or Redemption of Qualified Entity Interests Restrictive covenants, maximum annual repurchase, redemption or acquired equity interests, up to Debt Instrument, Restrictive Covenants, Maximum Annual Redemption, Repurchase, Acquired Equity Interests Debt Instrument, Restrictive Covenants, Maximum Annual Redemption, Repurchase, Acquired Equity Interests Restrictive covenants, maximum annual payment for stock option plans, employment agreements and incentive plans, up to Debt Instrument, Restrictive Covenants, Maximum Annual Payment For Stock Option Plans, Employment Agreements and Incentive Plans Debt Instrument, Restrictive Covenants, Maximum Annual Payment For Stock Option Plans, Employment Agreements and Incentive Plans Restrictive covenants, maximum annual payment for other restricted payments, up to Debt Instrument, Restrictive Covenants, Maximum Annual Payment For Other Restricted Payments Debt Instrument, Restrictive Covenants, Maximum Annual Payment For Other Restricted Payments Maximum leverage ratio Debt Instrument, Covenant Description, Maximum Leverage Ratio Debt Instrument, Covenant Description, Maximum Leverage Ratio Total amount of outstanding debt Long-term Debt and Capital Lease Obligations Cash available Cash and Cash Equivalents, at Carrying Value Operating lease obligations Operating Leases, Future Minimum Payments Due Number of suppliers Number Of Suppliers Number of suppliers. Asset impairment charges Asset Impairment Charges Property and equipment owned, net Property, Plant and Equipment, Net Impairment of property and equipment Impairment of Long-Lived Assets Held-for-use Number of restaurants that are impaired Number Of Impaired Restaurants Number Of Impaired Restaurants Number of restaurants closed Number of Restaurants Closed Number of Restaurants Closed Closed-store reserve expense (recovery) Restructuring Costs Unrecognized tax benefits, accrual of interest or penalties Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Unrecognized tax benefits, interest or penalties expenses Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Federal statutory tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Percentage of cash savings in taxes realized as a result of utilizing net operating losses payable to pre-IPO stockholders Percentage Of Operating Loss Carryforwards Tax Savings Payable To Pre Initial Public Offering Stockholders Percentage of operating loss carry forwards tax savings payable to pre initial public offering stockholders. Franchise agreement renewal term (in years) Finite-Lived Intangible Asset, Useful Life Renewal Period Finite-Lived Intangible Asset, Useful Life Renewal Period Deferred tax assets Deferred Income Tax Assets, Net Total assets Assets Other accrued expenses and current liabilities Other Liabilities, Current Total current liabilities Liabilities, Current Other noncurrent liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Accumulated deficit Retained Earnings (Accumulated Deficit) Total stockholders' equity Stockholders' Equity Attributable to Parent Total liabilities and stockholder’s equity Liabilities and Equity Franchise and advertising fee revenue Total expenses Income (loss) from operations Income (loss) before provision for income taxes Other Accrued Expenses and Current Liabilities Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Liquidity Liquidity Policy [Policy Text Block] Liquidity Policy [Policy Text Block] Recent Accounting Pronouncements Adopted and Not Yet Adopted and Changes in Accounting Policies New Accounting Pronouncements, Policy [Policy Text Block] Concentration of Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Goodwill and Indefinite Lived Intangible Assets Goodwill and Intangible Assets, Policy [Policy Text Block] Fair Value Measurement Fair Value Measurement, Policy [Policy Text Block] Impairment of Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Closed-Store Reserves Costs Associated with Exit or Disposal Activity or Restructuring [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Assets Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Accounts and other receivables, net Receivables, Net, Current Inventories Inventory, Net Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property held under capital leases, net Capital Leases, Balance Sheet, Assets by Major Class, Net Goodwill Goodwill Trademarks Indefinite-Lived Trademarks Other intangible assets, net Other Intangible Assets, Net Other assets Other Assets, Noncurrent Total assets Liabilities and Stockholders' Equity Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Current portion of obligations under capital leases Capital Lease Obligations, Current Accounts payable Accounts Payable, Current Accrued salaries and vacation Employee-related Liabilities, Current Accrued insurance Accrued Insurance, Current Accrued income taxes payable Accrued Income Taxes, Current Accrued interest Interest Payable, Current Current portion of income tax receivable agreement payable Payable Under Tax Receivable Agreement Current Payable under tax receivable agreement current. Total current liabilities Obligations under capital leases, net of current portion Capital Lease Obligations, Noncurrent Deferred taxes Deferred Income Tax Liabilities, Net Other intangible liabilities, net Intangible Liabilities Noncurrent Intangible liabilities noncurrent. Income tax receivable agreement payable, net of current portion Payable Under Tax Receivable Agreement Noncurrent Payable under tax receivable agreement noncurrent. Total liabilities Commitments and contingencies Commitments and Contingencies Stockholders' Equity Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.01 par value, 100,000,000 shares authorized; none issued or outstanding Preferred Stock, Value, Issued Common stock, $0.01 par value—200,000,000 shares authorized; 39,066,736 and 38,661,850 shares issued and outstanding Common Stock, Value, Issued Additional paid-in-capital Additional Paid in Capital, Common Stock Total stockholders' equity Total liabilities and stockholder’s equity Dilutive effect of stock options and restricted shares (shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Weighted-average shares outstanding— diluted (shares) Change in Contract with Customer, Liability [Roll Forward] Change in Contract with Customer, Liability [Roll Forward] Change in Contract with Customer, Liability [Roll Forward] December 28, 2017 Contract with Customer, Liability Revenue recognized - beginning balance Contract with Customer, Liability, Revenue Recognized Additional contract liability Contract with Customer, Liability, New Contract Additions Contract with Customer, Liability, New Contract Additions Revenue recognized - additional contract liability Contract with Customer, Liability, New Contract Additions, Revenue Recognized Contract with Customer, Liability, New Contract Additions, Revenue Recognized September 26, 2018 Credit Agreements Debt Disclosure [Text Block] Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Schedule of Change in Franchise Contract Liability Balances Contract with Customer, Asset and Liability [Table Text Block] Schedule of Estimated Revenue to be Recognized Related to Performance Obligations Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] Performance Obligation Type [Axis] Performance Obligation Type [Axis] Performance Obligation Type [Axis] Performance Obligation Type [Domain] Performance Obligation Type [Domain] [Domain] for Performance Obligation Type [Axis] Hardware Services Hardware Services [Member] Hardware Services [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Retained Earnings Retained Earnings [Member] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Cumulative catch-up adjustment Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Modification of Contract Revenue allocated to loyalty points not redeemed Accrued Loyalty Rewards Program Liability, Current Accrued Loyalty Rewards Program Liability, Current Loyalty rewards program, expected loyalty points redemption period (in years) Loyalty Rewards Program, Expected Loyalty Points Redemption Period Loyalty Rewards Program, Expected Loyalty Points Redemption Period Franchise agreement term (in years) Finite-Lived Intangible Asset, Useful Life Satisfied over renewal term (in years) Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Unsatisfied performance obligations Revenue, Remaining Performance Obligation, Amount Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Franchise Contract Franchise Contract [Member] Franchise Contract [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Performance obligations expected to be satisfied, expected timing Schedule Of Property Plant And Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type Property, Plant and Equipment, Type [Domain] Land Land [Member] Buildings and improvements Building and Building Improvements [Member] Other property and equipment Property, Plant and Equipment, Other Types [Member] Construction in progress Construction in Progress [Member] Property Plant And Equipment [Line Items] Property, Plant and Equipment [Line Items] Property and equipment, gross Property, Plant and Equipment, Gross Less: accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, net Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Revenue from Contracts with Customers Revenue from Contract with Customer [Text Block] Gross value of assets under capital leases for buildings and improvements Capital Leased Assets, Gross Accumulated depreciation of assets under capital leases Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation Depreciation Depreciation Deferred rent Deferred Rent Credit, Noncurrent Franchise contract liability Contract with Customer, noncurrent Contract with Customer, noncurrent Other Other Sundry Liabilities, Noncurrent Total other noncurrent liabilities Core and Non-core Status [Axis] Core and Non-core Status [Axis] Core and Non-core Status [Domain] Core and Non-core Status [Domain] Core Market Core [Member] Non-Core Market Non-core [Member] Net Income (Loss) Per Share Earnings Per Share [Text Block] Interest Income Investment Income, Bank Earning Allowance And Miscellaneous Interest Investment Income, Bank Earning Allowance And Miscellaneous Interest Accrued sales and property taxes Taxes Payable, Current Gift card liability Gift Card Liability, Current Accrued legal and professional fees Accrued Professional Fees Other Other Accrued Liabilities, Current Total other accrued expenses and current liabilities Other Commitments [Table] Other Commitments [Table] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Impact Damages Impact Damages [Member] Impact Damages [Member] Lost Opportunity Damages Lost Opportunity Damages [Member] Lost Opportunity Damages [Member] Total Damages Total Damages [Member] Total Damages [Member] Category of Item Purchased Category of Item Purchased [Axis] Long-term Purchase Commitment, Category of Item Purchased Long-term Purchase Commitment, Category of Item Purchased [Domain] Chicken Chicken [Member] Chicken. Guarantor Obligations, Nature Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature Guarantor Obligations, Nature [Domain] Property Lease Guarantee Property Lease Guarantee [Member] Title of Individual Title of Individual [Axis] Relationship to Entity Relationship to Entity [Domain] Officers Officer [Member] Other Commitments [Line Items] Other Commitments [Line Items] Date of class action filed in court Loss Contingency, Lawsuit Filing Date Number of lawsuits consolidated Number Of Lawsuits Number of lawsuits. Value of damages awarded Loss Contingency, Damages Awarded, Value Accrual associated with loss contingencies Loss Contingency Accrual Purchase commitments, estimated obligations Purchase Obligation Number of leases assigned to franchisees Number Of Leases Number of leases. Latest lease expiration year Lease Expiration Year Lease expiration year. Contingent lease obligations, maximum exposure Guarantor Obligations, Maximum Exposure, Undiscounted Contingent lease obligations, maximum exposure, if discounted at estimated pre-tax cost of debt Guarantee Obligations Maximum Net Exposure Guarantee obligations maximum net exposure. Number of at-will employment agreements Number Of Employment Agreements Number of employment agreements. Employment agreement expense Employment Agreement Expense Employment Agreement Expense Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Emerging Growth Company Entity Emerging Growth Company Small Business Entity Entity Small Business Entity Ex Transition Period Entity Ex Transition Period Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income Adjustments to reconcile net income to net cash flows provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Stock-based compensation expense Loss on disposal of assets Closed-store reserve expense Amortization of deferred financing costs Amortization of Debt Issuance Costs Amortization of favorable and unfavorable leases, net Amortization of above and below Market Leases Deferred income taxes, net Deferred Income Tax Expense (Benefit) Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts and other receivables, net Increase (Decrease) in Accounts and Other Receivables Inventories Increase (Decrease) in Inventories Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Other assets Increase (Decrease) in Other Operating Assets Accounts payable Increase (Decrease) in Accounts Payable Accrued salaries and vacation Increase (Decrease) in Employee Related Liabilities Accrued insurance Increase (Decrease) in Insurance Liabilities Income taxes payable Increase (Decrease) in Income Taxes Other accrued expenses and liabilities Increase (Decrease) in Other Accrued Liabilities Restricted cash Increase (Decrease) in Restricted Cash Net cash flows provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment Net cash flows used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Minimum tax withholdings related to net share settlements Payments Related to Tax Withholding for Share-based Compensation Payments on revolver loan Repayments of Lines of Credit Borrowings on revolver loan Proceeds from Long-term Lines of Credit Deferred financing costs on revolver loan Payments of Financing Costs Proceeds from issuance of common stock upon exercise of stock options, net of expenses Proceeds from Issuance of Common Stock Payment of obligations under capital leases Repayments of Long-term Capital Lease Obligations Net cash flows used in financing activities Net Cash Provided by (Used in) Financing Activities (Decrease) increase in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Supplemental cash flow information Supplemental Cash Flow Information [Abstract] Cash paid during the period for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Cash paid during the period for income taxes Income Taxes Paid Unpaid purchases of property and equipment Capital Expenditures Incurred but Not yet Paid Schedule of Non-cash Transactions Noncash Investing and Financing Items [Abstract] Borrowing on Revolver for Financing Fees Debt Issuance Costs Incurred During Noncash or Partial Noncash Transaction Non-Financial Instruments Measured at Fair Value on a Nonrecurring Basis Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block] Impact of New Accounting Pronouncements and Changes in Accounting Policies Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]