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Goodwill - Narrative (Detail) - USD ($)
3 Months Ended 9 Months Ended
Feb. 02, 2020
Jan. 27, 2019
Feb. 02, 2020
Jan. 27, 2019
Goodwill And Intangible Assets Disclosure [Abstract]        
Impairment charge $ 11,200,000 $ 0 $ 11,211,000 $ 0