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Stock-Based Compensation - Summary of Stock Option Activity (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]    
Options outstanding shares, beginning balance 2,150  
Options, exercised (21)  
Options, canceled (173)  
Options outstanding shares, ending balance 1,956 2,150
Options outstanding shares, exercisable 1,511  
Options outstanding weighted average exercise price, beginning balance $ 11.49  
Options, weighted average exercise price, exercised 7.92  
Options, weighted average exercise price, canceled 13.55  
Options outstanding weighted average exercise price, ending balance 11.34 $ 11.49
Options outstanding weighted average exercise price, exercisable $ 11.01  
Options outstanding aggregate intrinsic value $ 620 $ 378
Options exercisable aggregate intrinsic value $ 620  
Option outstanding weighted average remaining term 5 years 3 months 21 days 5 years 1 month 17 days
Options exercisable weighted average remaining term 4 years 3 months 29 days