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Income Taxes - Allocation of Income Tax Expense (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	May 03, 2020	Feb. 02, 2020	Nov. 03, 2019	Aug. 04, 2019	Apr. 28, 2019	Jan. 27, 2019	Oct. 28, 2018	Jul. 29, 2018	May 03, 2020	Apr. 28, 2019	Apr. 29, 2018
Income Tax Disclosure [Abstract]
(loss) income from continuing operations	$ 704	$ (973)	$ 1,930	$ 1,692	$ 3,091	$ 1,274	$ 1,270	$ 906	$ 3,354	$ 6,537	$ 5,740
loss from discontinued operations	$ (25)		$ (32)	$ (11)	$ (74)	$ (49)	$ 6		(68)	(113)
Total income tax expense									$ 3,286	$ 6,424	$ 5,740

Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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