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Employee Benefit Programs - Employee Stock Purchase Plan (Details) $ / shares in Units, $ in Millions | 1 Months Ended | 12 Months Ended
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Dec. 31, 2022 shares | May 31, 2020 shares | Jul. 31, 2017 restaurant shares | Dec. 25, 2022 USD ($) $ / shares shares | Dec. 26, 2021 USD ($) $ / shares shares | Dec. 27, 2020 USD ($) $ / shares shares | Dec. 29, 2019 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Total stock-based compensation cost | $ |  |  |  | $ 6.3 | $ 6.6 | $ 4.3 |
Share-based compensation arrangement by share-based payment award, number of additional shares authorized (in shares) |  |  |  |  |  | 275,000 | 660,000
Employee Stock Purchase Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Maximum number of shares of the company's common stock that may be issued or transferred (in shares) |  |  | 100,000 | 600,000 |  |  |
Maximum percentage of base compensation that can be contributed by the eligible team members |  |  | 15.00% |  |  |  |
Estimated subscription date fair value (as a percent) |  |  | 85.00% |  |  |  |
Requisite employment period to be eligible to participate in the plan |  |  | 1 year |  |  |  |
Requisite working hours per week to be eligible to participate in the plan | restaurant |  |  | 20 |  |  |  |
Operational period of the plan |  |  | 6 months |  |  |  |
Stock issued during period, shares, employee stock purchase plans (in shares) |  |  |  | 63,841 | 42,563 |  |
Number of shares available for future issuance under the plan (in shares) |  |  |  | 55,585 |  |  |
Risk-free interest rate |  |  |  |  | 0.31% | 0.10% |
Expected years until exercise |  |  |  | 6 months | 6 months | 6 months |
Expected stock volatility |  |  |  |  | 53.94% | 50.40% |
Dividend yield |  |  |  | 0.00% | 0.00% | 0.00% |
Awarded (in dollars per share) | $ / shares |  |  |  | $ 0.99 | $ 4.36 | $ 2.16 |
Total stock-based compensation cost | $ |  |  |  | $ 0.1 | $ 0.2 | $ 0.1 |
Share-based compensation arrangement by share-based payment award, number of additional shares authorized (in shares) |  | 150,000 |  |  |  |  |
Employee Stock Purchase Plan | Subsequent event |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, number of additional shares authorized (in shares) | 350,000 |  |  |  |  |  |
Employee Stock Purchase Plan | Minimum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Risk-free interest rate |  |  |  | 1.84% |  |  |
Expected stock volatility |  |  |  | 54.13% |  |  |
Employee Stock Purchase Plan | Maximum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Risk-free interest rate |  |  |  | 4.05% |  |  |
Expected stock volatility |  |  |  | 55.00% |  |  |

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- Definition Represents the operational period for employee stock purchase plan. + References No definition available. + Details
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- Definition Represents the minimum employment period required to be eligible to participate in the employee stock purchase plan. + References No definition available. + Details
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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Number of additional shares authorized for issuance under share-based payment arrangement. + References No definition available. + Details
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- Definition Number of shares authorized for issuance under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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