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Reconciliation of Income Taxes At Federal Statutory Rate to Effective Rate (Detail)	12 Months Ended
	Jan. 31, 2021	Feb. 02, 2020	Feb. 03, 2019
Reconciliation of Statutory Federal Tax Rate [Line Items]
Federal income taxes at the statutory rate	21.00%	21.00%	21.00%
Re-measurement of deferred tax assets and liabilities			(2.20%)
Transition tax			(0.60%)
State income tax rate	3.90%	2.90%	3.80%
Officer's compensation under Sec.162(m)	1.10%	1.00%
Change in uncertain tax positions	0.20%	0.50%	4.10%
Deferred true up	(0.60%)	(1.30%)
Rate differential	(1.10%)	(1.80%)	(2.30%)
Research and development credits	(0.20%)	(0.70%)	(2.10%)
Other	(0.40%)	0.50%	0.60%
Effective tax rate	23.90%	22.10%	22.30%

X

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the income tax rates.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 6.I.Fact.4)
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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Topic 740
-SubTopic 10
-Section S99
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Effective income tax rate reconciliation change in deferred tax assets and deferred tax liabilities.

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Effective Income Tax Rate Reconciliation Change In Uncertain Tax Positions

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Effective income tax rate reconciliation, deferred true up, percent.

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Effective income tax rate reconciliation, Officer's compensation under Sec.162(m), percent.

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Effective income tax rate reconciliation, transition tax, percent.

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Reconciliation of Statutory Federal Tax Rate [Line Items]

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