Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v2.4.0.6
Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
 12 Months Ended 12 Months Ended 1 Months Ended
Dec. 30, 2012
Segment
Restaurant
State
Dec. 25, 2011
Restaurant
Dec. 26, 2010
Restaurant
Dec. 30, 2012
Minimum
Furniture Fixtures And Equipment
Dec. 30, 2012
Minimum
Leasehold Improvements
Dec. 30, 2012
Maximum
Furniture Fixtures And Equipment
Dec. 30, 2012
Maximum
Leasehold Improvements
Nov. 30, 2012
Secured Revolving Credit Facility
May 24, 2011
Senior Secured Credit Facility
Dec. 30, 2012
IPO
Jul. 27, 2012
IPO
Jul. 27, 2012
IPO
Underwriter Allotment
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]                        
Number of restaurants 39 31 23                  
Number of states 7                      
Sale of stock (in shares)                   6,708,332   874,999
Net proceeds from the offering stock $ 81,104,000 $ 183,000 $ 5,351,000             $ 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               60,000,000 11,818,345  
Convertible preferred stock, common shares issued upon conversion 1                 1    
Common stock par value $ 0.01 $ 0.01               $ 0.01 $ 0.01  
Preferred stock authorized shares 15,000,000 10,657,252               15,000,000 9,017,217  
Preferred stock share par value $ 0.01 $ 0.01               $ 0.01 $ 0.01  
Estimated useful lives       3 years 5 years 7 years 20 years          
Credit facility maximum borrowing capacity               25,000,000 67,500,000      
Marketing expense $ 1,319,000 $ 964,000 $ 655,000                  
Number of reporting segments 1