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Organization, Consolidation, and Basis of Presentation (Details) | 9 Months Ended
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Sep. 28, 2024 region
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Number of geographic regions | 2
Number of sub geographical regions | 3

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of geographic regions in which the company operates. + References No definition available. + Details
Name: | usna_NumberOfGeographicRegions
Namespace Prefix: | usna_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of sub-geographical regions the company operates in. + References No definition available. + Details
Name: | usna_NumberOfSubGeographicalRegions
Namespace Prefix: | usna_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration