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Intangible Asset - Summary of Intangible Assets (Detail) - USD ($)
$ in Thousands
Feb. 02, 2020
Apr. 28, 2019
Jan. 27, 2019
Apr. 29, 2018
Intangible Assets [Line Items]        
Tradenames $ 4,804 $ 7,232 $ 7,232 $ 683
Intangible assets 7,738 10,448 [1] 10,542  
Customer Relationships [Member]        
Intangible Assets [Line Items]        
Finite-lived intangible assets, net 2,313 2,538 2,613 2,839
Non-Compete Agreement [Member]        
Intangible Assets [Line Items]        
Finite-lived intangible assets, net $ 621 $ 678 $ 697 $ 753
[1] Derived from audited financial statements.