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Share-Based Compensation - Share-Based Compensation Expense (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 28, 2018
Jul. 29, 2017
Jul. 28, 2018
Jul. 29, 2017
Share-based Compensation [Abstract]        
Stock Options $ 200 $ 117 $ 356 $ 211
Restricted Stock Awards and Restricted Stock Units 263 289 467 363
Employee Stock Purchase Plan 3 3 6 6
Total $ 466 $ 409 $ 829 $ 580