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Intangible Assets - Additional Information (Detail) - USD ($)
3 Months Ended
Apr. 28, 2018
Apr. 29, 2017
Impairment of Intangible Assets (Excluding Goodwill) [Abstract]    
Impairments of intangible assets $ 0 $ 0
Amortization expense $ 1,024,000 $ 298,000