Intangible Assets - Summary of Change in Carrying Amount of Finite-Lived Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 02, 2021	May 03, 2020	Apr. 28, 2019
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Beginning balance	$ 2,238	$ 2,538	$ 2,839
Amortization expense	(301)	(300)	(301)
Ending balance	1,937	2,238	2,538
Non-Compete Agreement [Member]
Finite Lived Intangible Assets [Line Items]
Beginning balance	602
Ending balance	527	602
Non-Compete Agreement [Member] | Prior Acquisition [Member] | Mattress Fabrics [Member]
Finite Lived Intangible Assets [Line Items]
Beginning balance	602	678	753
Amortization expense	(75)	(76)	(75)
Ending balance	$ 527	$ 602	$ 678