Income Taxes - Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands		May 03, 2020	Apr. 28, 2019	Apr. 29, 2018	Apr. 30, 2017
deferred tax assets:
accounts receivable		$ 263	$ 282
Inventories		2,280	1,591
Compensation		1,970	1,973
liabilities and other		166	284
intangible assets and goodwill		856
property, plant, and equipment	[1]	185	193
operating lease liability		671
foreign income tax credits - U.S.		783	1,252
loss carryforwards – U.S.		4,137	2,360
valuation allowances		(3,148)	(748)	$ (5,204)	$ (536)
total deferred tax assets		8,163	7,187
deferred tax liabilities:
undistributed earnings on foreign subsidiaries		(3,409)	(3,523)
unrecognized tax benefits – U.S.			(380)
property, plant and equipment	[2]	(5,008)	(4,710)
right of use asset		(690)
Goodwill			(1,203)
Other		(81)	(90)
total deferred tax liabilities		(9,188)	(9,906)
Net deferred liabilities		$ (1,025)	$ (2,719)

[1] Pertains to the company’s operations located in China.

[2] Pertains to the company’s operations located in the U.S. and Canada.