Income Taxes - Schedule of Reconciliation of Valuation Allowance (Detail) - USD ($) $ in Thousands	12 Months Ended
Feb. 02, 2019	Feb. 03, 2018	Jan. 28, 2017
Income Tax Disclosure [Abstract]
Balance at beginning of fiscal year	$ 1,190	$ 760	$ 158
Net changes in deferred tax assets and liabilities	428	430	602
Balance at end of fiscal year	$ 1,618	$ 1,190	$ 760

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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

Name:	us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant