Income Taxes - Income Tax Expense (Detail) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		May 03, 2020	Feb. 02, 2020	Nov. 03, 2019	Aug. 04, 2019	Apr. 28, 2019	Jan. 27, 2019	Oct. 28, 2018	Jul. 29, 2018	May 03, 2020	Apr. 28, 2019	Apr. 29, 2018
current
federal											$ (1,492)	$ (1,367)
state										$ 7	27	9
2017 Tax Cuts and Jobs Act											(282)	4,854
foreign										4,248	6,144	4,726
uncertain income tax positions										725
current income tax expense										4,980	4,397	8,222
deferred
federal										(1,875)	3,236	4,295
state										(103)	(96)	112
2017 Tax Cuts and Jobs Act	[1]										(268)	(6,903)
undistributed earnings – foreign subsidiaries										(114)	3,735	(195)
U.S. Federal & State carryforwards and credits										(1,307)	74
uncertain income tax positions										(380)
foreign										(247)	(85)	93
valuation allowance	[1]									2,400	(4,456)	116
deferred income tax expense										(1,626)	2,140	(2,482)
income tax expense		$ 704	$ (973)	$ 1,930	$ 1,692	$ 3,091	$ 1,274	$ 1,270	$ 906	$ 3,354	$ 6,537	$ 5,740

[1] The income tax benefit of $6,903 recorded during fiscal 2018 included a charge of $4,550 for the establishment of a valuation allowance against U.S. foreign tax credits that were not more-likely-than not to be realized as a result of the 2017 Tax Cuts and Jobs Act. During fiscal 2019, we recorded an income tax charge of $4.5 million for the write-off of certain U.S. foreign tax credits, and in turn, we recorded an income tax benefit of $4.5 million for the reduction in our valuation allowance. The $4.5 million income charge for the write-off of certain U.S. foreign tax credits is included in the undistributed earnings – foreign subsidiaries income tax expense amount of $3,735.