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Income Taxes - Effective Income Tax Rate - Narrative (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Nov. 03, 2019
Oct. 28, 2018
Nov. 03, 2019
Oct. 28, 2018
Income Tax Disclosure [Abstract]        
Income taxes $ 1,898 $ 1,276 $ 3,580 $ 2,182
Effective income tax rate     51.50% 35.10%