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Share-Based Compensation - Share-Based Compensation Expense (Detail) - USD ($)
$ in Thousands
3 Months Ended
Apr. 28, 2018
Apr. 29, 2017
Share-based Compensation [Abstract]    
Stock Options $ 156 $ 94
Restricted Stock Awards and Restricted Stock Units 204 74
Employee Stock Purchase Plan 3 3
Total $ 363 $ 171