v3.8.0.1
Stock-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Aug. 31, 2017
May 31, 2017
Sep. 24, 2017
Sep. 25, 2016
Sep. 24, 2017
Sep. 25, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Weighted average common stock fair value         $ 11.55  
Recognized stock-based compensation expense     $ 1,400 $ 800 $ 3,263 $ 2,266
Unrecognized stock compensation expense     4,900   $ 4,900  
Unrecognized stock compensation expense, recognition period         2021  
Restricted Stock Units (RSUs) [Member] | Non-Employee Board Of Directors [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Restricted stock units issued 2,608 153,369        
Restricted stock units issued, grant-date fair value $ 11.15 $ 11.05        
Vesting description         The senior leadership team grants vest in one-third increments over a three-year period beginning in March 2018.  
Vesting period         3 years  
Restricted Stock Units (RSUs) [Member] | Non-Employee Board Of Directors [Member] | First Anniversary [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting percentage 50.00% 50.00%        
Restricted Stock Units (RSUs) [Member] | Non-Employee Board Of Directors [Member] | Second Anniversary [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting percentage 50.00% 50.00%        
Chief Executive Officer (CEO) Transition Costs [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Recognized stock-based compensation expense     $ 600   $ 800  
2013 Long Term Incentive Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Weighted average common stock fair value         $ 4.58  
Expected life of options         6 years 3 months  
Volatility         36.37%  
Risk-free interest rate         2.23%  
Dividend yield         0.00%  
Method used to determine fair value of the options         Black-Scholes option pricing model