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Information about Options to Purchase Shares (Detail) - $ / shares | 12 Months Ended
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Feb. 01, 2020 | Feb. 02, 2019 | Feb. 03, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Options granted, exercise price lower range | $ 145.08 | $ 113.80 | $ 80.91
Options granted, exercise price upper range | 231.86 | $ 172.40 | $ 110.50
Options, Exercise price, average | $ 180.22 |  |
Options Outstanding, Number Outstanding | 1,890,955 | 2,337,316 |
Options Exercisable, Number Exercisable | 671,406 |  |
Exercise prices $0.79 - $4.55 |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Options granted, exercise price lower range | $ 0.79 |  |
Options granted, exercise price upper range | $ 4.55 |  |
Options Outstanding, Number Outstanding | 399,129 |  |
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 3 years 4 months 24 days |  |
Options Exercisable, Number Exercisable | 247,329 |  |
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 3 years 4 months 24 days |  |
Exercise price $26.96 |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Options, Exercise price, average | $ 26.96 |  |
Options Outstanding, Number Outstanding | 1,491,826 |  |
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 7 years 8 months 12 days |  |
Options Exercisable, Number Exercisable | 424,077 |  |
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 6 years 3 months 18 days |  |

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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