Additions made to capitalized computer software costs during the period.

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Amount of expense for amortization of capitalized computer software costs.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Internal-use Software and Website Development Costs - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 27, 2018	Oct. 28, 2017	Oct. 27, 2018	Oct. 28, 2017
Software and Software Development Costs
Finite-Lived Intangible Assets [Line Items]
Useful Life			3 years
Capitalized software costs			$ 6,460	$ 8,610
Capitalized Computer Software, Amortization	$ 5,844	$ 5,471	$ 11,688	$ 10,845
Website Development Costs
Finite-Lived Intangible Assets [Line Items]
Useful Life			7 years