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Summary of Significant Accounting Policies (Narrative) (Detail) (USD $)
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9 Months Ended | 12 Months Ended | 9 Months Ended | 1 Months Ended | 9 Months Ended | |||||||
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Sep. 23, 2012
Segment
State
Restaurants
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Sep. 25, 2011
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Dec. 25, 2011
Restaurants
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Dec. 26, 2010
Restaurants
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Dec. 27, 2009
Restaurants
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Sep. 23, 2012
Minimum
Leasehold Improvements
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Sep. 23, 2012
Minimum
Furniture Fixtures And Equipment
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Sep. 23, 2012
Maximum
Leasehold Improvements
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Sep. 23, 2012
Maximum
Furniture Fixtures And Equipment
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Jul. 27, 2012
IPO
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Sep. 23, 2012
IPO
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Jul. 27, 2012
IPO
Grants To Non Executive Employees
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| Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] | ||||||||||||
| Number of restaurant | 38 | 31 | 23 | 17 | ||||||||
| Number of states | 8 | |||||||||||
| Sale of stock 2012 IPO (in shares) | 10,865,757 | 6,708,332 | ||||||||||
| Shares issued to cover over allotment | 874,999 | |||||||||||
| Net proceeds from the offering stock | $ 81,104,000 | $ 83,000 | $ 183,000 | $ 5,351,000 | $ 200,000 | $ 78,100,000 | ||||||
| Estimated offering expenses | 9,100,000 | |||||||||||
| Repayment of credit facilities | 79,400,000 | |||||||||||
| Total outstanding debt under the credit facility | 5,000,000 | |||||||||||
| Common stock shares authorized | 60,000,000 | 11,818,345 | 11,818,345 | 11,818,345 | 60,000,000 | |||||||
| Common stock par value | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01 | ||||||||
| Preferred stock authorized shares | 15,000,000 | 10,657,252 | 10,657,252 | 9,017,217 | 15,000,000 | |||||||
| Preferred stock share par value | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01 | ||||||||
| Estimated useful lives | 5 years | 3 years | 20 years | 7 years | ||||||||
| Long-term debt, carrying value | 4,994,000 | 55,200,000 | 30,732,000 | |||||||||
| Long-term debt, fair value | 31,235,000 | |||||||||||
| Change in fair value of long term debt | 503,000 | |||||||||||
| Marketing expense | $ 954,000 | $ 733,000 | $ 964,000 | $ 655,000 | $ 533,000 | |||||||
| Number of reporting segment | 1 | |||||||||||
| X | ||||||||||
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- Definition
Expenses On Issuance Of Common Stock No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Shares sold to underwriters pursuant to their over allotment option. No definition available.
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| X | ||||||||||
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- Definition
Unrealized Gains Losses No definition available.
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| X | ||||||||||
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- Definition
Face amount or stated value of common stock per share; generally not indicative of the fair market value per share. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The maximum number of common shares permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. No definition available.
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| X | ||||||||||
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- Definition
Expenditures for planning and executing the conception, pricing, promotion, and distribution of ideas, goods, and services. Costs of public relations and corporate promotions are typically considered to be marketing costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. No definition available.
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| X | ||||||||||
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- Definition
Represents the number of restaurants. No definition available.
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| X | ||||||||||
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- Definition
The number of states the entity operates in as of the balance sheet date. No definition available.
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| X | ||||||||||
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- Definition
Face amount or stated value per share of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer); generally not indicative of the fair market value per share. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The cash inflow from the additional capital contribution to the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. No definition available.
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| X | ||||||||||
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- Definition
The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. No definition available.
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| X | ||||||||||
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- Definition
Number of new stock issued during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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