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Intangible Assets - Summary of Intangible Assets (Detail) - USD ($)
Oct. 31, 2021
May 02, 2021
Nov. 01, 2020
May 03, 2020
Intangible Assets [Line Items]        
Tradename $ 540,000 $ 540,000 $ 540,000  
Intangible assets 2,816,000 3,004,000 [1] 3,192,000  
Customer Relationships [Member]        
Intangible Assets [Line Items]        
Finite-lived intangible assets, net 1,787,000 1,937,000 2,087,000 $ 2,238,000
Non-Compete Agreement [Member]        
Intangible Assets [Line Items]        
Finite-lived intangible assets, net $ 489,000 $ 527,000 $ 565,000 $ 602,000
[1] Derived from audited financial statements.