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Accrued Expenses (Detail) - USD ($)
$ in Thousands
Oct. 28, 2018
Apr. 29, 2018
Oct. 29, 2017
Payables and Accruals [Abstract]      
Compensation, commissions and related benefits $ 3,353 $ 6,918 $ 5,399
Interest   20 18
Other accrued expenses 5,317 3,150 1,947
Accrued expenses $ 8,670 $ 10,088 $ 7,364