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Summary of Significant Accounting Policies - Additional Information (Detail) |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Feb. 04, 2018 USD ($) | Nov. 03, 2018 USD ($) | Oct. 28, 2017 USD ($) | Nov. 03, 2018 USD ($) Segment | Oct. 28, 2017 USD ($)
Significant Accounting Policies [Line Items] |  |  |  |  |
Number of reportable segments | Segment |  |  |  | 1 |
Short-term investments |  | $ 79,856,000 | $ 0 | $ 79,856,000 | $ 0
Long-term investments |  |  | 0 |  | 0
Weighted average remaining useful life, assets |  |  |  | 8 years |
Long-lived asset impairment charges |  | 0 | 0 | $ 0 | 0
Finite-lived impairment charges |  | 0 | 0 | 0 | 0
Revenue related to gift card breakage |  | 1,600,000 | 1,600,000 | $ 6,200,000 | 6,100,000
Number of operating segments | Segment |  |  |  | 2 |
Prepaid Expenses and Other |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Right of return asset |  | 3,900,000 |  | $ 3,900,000 |
Other Liabilities and Accrued Expenses |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Sales return reserve liability, net |  | 11,100,000 | $ 5,200,000 | $ 11,100,000 | $ 5,200,000
Minimum |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Finite lived intangibles, useful life |  |  |  | 15 years |
Maximum |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Finite lived intangibles, useful life |  |  |  | 25 years |
Accounting Standards Update 2014-09 |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Net increase to opening retained earnings due to cumulative impact of adoption | $ 200,000 |  |  | $ 152,000 |
Non-cancellable Operating Leases |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Minimum lease commitments |  | $ 1,600,000,000 |  | $ 1,600,000,000 |

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