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Intangible Asset - Tradenames (Detail) - USD ($)
$ in Thousands
6 Months Ended
Nov. 03, 2019
Oct. 28, 2018
Indefinite-lived Intangible Assets [Line Items]    
Beginning balance $ 7,232 $ 683
Acquisition of business (note 3) 6,549
Ending balance $ 7,232 $ 7,232