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Commitments and Contingencies - Narrative (Details) | Oct. 12, 2022 litigationDemand
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Pending Litigation |
Loss Contingencies [Line Items] |
Number of litigation demands | 2

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- Definition Loss Contingency, Number Of Litigation Demands + References No definition available. + Details
Name: | snbr_LossContingencyNumberOfLitigationDemands
Namespace Prefix: | snbr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |