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Inventories - Schedule of Finished Goods Inventories (Details) - USD ($) $ in Thousands | Dec. 30, 2023 | Dec. 31, 2022
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Inventory Disclosure [Abstract] |  |
Finished beds, including deliveries in-transit to those customers who have utilized home delivery services | $ 39,235 | $ 36,708
Finished components that were ready for assembly for the completion of beds | 46,179 | 45,722
Retail accessories | 20,835 | 23,717
Finished goods inventory | $ 106,249 | $ 106,147

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- Definition Carrying amount as of the balance sheet date of merchandise included in finished goods inventory, for finished and retail display beds. + References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date of merchandise ready for assembly that are included in the finished goods inventory as finished components. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Carrying amount as of the balance sheet date of merchandise, goods and components held by the company that are readily available for sale. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Carrying amount as of the balance sheet date of retail accessories included in finished goods inventory. + References No definition available. + Details
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Namespace Prefix: | snbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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