Intangible Assets - Summary of Intangible Assets (Detail) - USD ($)	Nov. 01, 2020	May 03, 2020	Nov. 03, 2019	Apr. 28, 2019
Intangible Assets [Line Items]
Tradenames	$ 540,000	$ 540,000	$ 7,232,000
Intangible assets	3,192,000	3,380,000	10,260,000
Customer Relationships [Member]
Intangible Assets [Line Items]
Finite-lived intangible assets, net	2,087,000	2,238,000	2,388,000	$ 2,538,000
Non-Compete Agreement [Member]
Intangible Assets [Line Items]
Finite-lived intangible assets, net	$ 565,000	$ 602,000	$ 640,000	$ 678,000