Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Additional Information (Detail)

v2.4.0.6
Stock-Based Compensation - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 30, 2012
Dec. 25, 2011
Dec. 26, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation $ 329 $ 352 $ 310
Estimated fair value of the common stock, per share $ 22.43    
Weighted-average grant date fair value of options granted $ 6.07 $ 5.71 $ 4.17
Total unrecognized compensation costs 796    
Immediately recognized unrecognized compensation costs $ 597    
2006 Plan
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum term 10 years    
Options granted on the first anniversary of the date of grant, percentage 20.00%    
Options granted on the second anniversary of the date of grant, percentage 20.00%    
Options granted on the third anniversary of the date of grant, percentage 20.00%    
Options granted on the fourth anniversary of the date of grant, percentage 20.00%    
Options granted on the fifth anniversary of the date of grant, percentage 20.00%    
2006 Plan | Pre Amended Plan
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common stock reserved for issuance 1,004,957    
2006 Plan | Amended Plan
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common stock reserved for issuance 1,070,209    
2012 Omnibus Equity Incentive Plan
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum term 10 years    
Options granted on the first anniversary of the date of grant, percentage 20.00%    
Options granted on the second anniversary of the date of grant, percentage 20.00%    
Options granted on the third anniversary of the date of grant, percentage 20.00%    
Options granted on the fourth anniversary of the date of grant, percentage 20.00%    
Options granted on the fifth anniversary of the date of grant, percentage 20.00%    
Shares of common stock are reserved and available for issuance 1,250,000