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Accrued Expenses - Narrative (Detail) - USD ($)
May 03, 2020
Apr. 28, 2019
Payables and Accruals [Line Items]    
Accrued expenses $ 5,854,000 $ 9,525,000
Current accrued expenses 5,687,000 8,632,000
Long-term accrued expenses $ 167,000 333,000
Current Liabilities Held For Sale - Discontinued Operation [Member]    
Payables and Accruals [Line Items]    
Accrued expenses   $ 560,000