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Income Taxes - Additional Information (Detail) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jul. 29, 2017 | Jul. 30, 2016 | Jul. 29, 2017 | Jul. 30, 2016 | Jan. 31, 2017
Income Tax Disclosure [Abstract] |  |  |  |  |
Income tax expense | $ 231,000 | $ 496,000 | $ 378,000 | $ 972,000 |
Income tax benefit from expiration of the statue of limitations |  | 97,000 | 71,000 | 97,000 |
Income tax benefit from windfall of stock | 12,000 |  | 27,000 |  |
Income tax benefit from disqualifying dispositions of stock |  | $ 39,000 |  | 39,000 |
Income tax benefit from filing of amended return |  |  |  | $ 52,000 |
Cumulative unrecognized tax benefits | $ 663,000 |  | 663,000 |  | $ 708,000
Developments affecting unrecognized tax benefits |  |  | $ 0 |  |

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- Definition Amount 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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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