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Income Taxes - Summary of Valuation Allowances Against Net Deferred Income Taxes (Detail) - USD ($) $ in Thousands	Aug. 02, 2020	May 03, 2020	Aug. 04, 2019
Valuation Allowance [Line Items]
Valuation allowance	$ 10,111	$ 3,148	$ 711
Capital Loss Carry Forwards and Credits [Member]
Valuation Allowance [Line Items]
Valuation allowance	2,281	2,281
Federal and State [Member] | Deferred Income Tax Assets [Member]
Valuation Allowance [Line Items]
Valuation allowance	$ 7,830	$ 867	$ 711

X

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

+ Details

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Details

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- Details

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