Income Taxes - Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 02, 2021	May 03, 2020	Apr. 28, 2019
current
federal	$ (17)		$ (1,492)
state	3	$ 7	27
2017 Tax Cuts and Jobs Act			(282)
foreign	4,151	4,248	6,144
uncertain income tax positions	(204)	725
current income tax expense	3,933	4,980	4,397
deferred
federal	(1,933)	(1,875)	3,236
state	(80)	(103)	(96)
2017 Tax Cuts and Jobs Act	(3,674)		(268)
undistributed earnings – foreign subsidiaries	112	(114)	3,735
U.S. Federal & State carryforwards and credits	451	974	74
uncertain income tax positions	380	(380)
foreign	(22)	(247)	(85)
valuation allowance	8,526	119	(4,456)
deferred income tax expense	3,760	(1,626)	2,140
income tax expense	$ 7,693	$ 3,354	$ 6,537