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Organization and principal accounting policies - Additional information (Details) $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Mar. 29, 2021 USD ($) | May 01, 2021 USD ($) | Jul. 31, 2021 USD ($) segment | Aug. 01, 2020 USD ($)
Business Acquisition [Line Items] |  |  |  |
Number of reportable segments (segment) | segment |  |  | 3 |
Acquisition of Rocksbox Inc., net of cash acquired |  |  | $ 14.4 | $ 0.0
Rocksbox |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Acquisition of Rocksbox Inc., net of cash acquired | $ 14.4 |  |  |
Acquisition and integration related costs |  | $ 1.1 |  |
Minimum |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Seasonal revenues, fourth quarter sales, percent |  |  | 35.00% |
Maximum |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Seasonal revenues, fourth quarter sales, percent |  |  | 40.00% |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=123586518&loc=d3e1043-128460 + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585 + Details
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