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Intangible Assets - Summary of Change in Carrying Amount of Finite-Lived Intangible Assets (Detail) - USD ($)
$ in Thousands
9 Months Ended
Feb. 02, 2020
Jan. 27, 2019
Customer Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Beginning balance $ 2,538 $ 2,839
Amortization expense (225) (226)
Ending balance 2,313 2,613
Non-Compete Agreement [Member]    
Finite-Lived Intangible Assets [Line Items]    
Beginning balance 678 753
Amortization expense (57) (56)
Ending balance $ 621 $ 697