| BUSINESS COMBINATIONS - Schedule of Business Acquisition, Pro Forma Information (Details) - Hiya direct-to-consumer - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 
|---|---|---|
| Jun. 29, 2024 | Jun. 29, 2024 | |
| Business Combination, Separately Recognized Transaction [Line Items] | ||
| Pro forma net sales | $ 238,678 | $ 491,830 | 
| Pro forma net earnings attributable to USANA | $ 9,429 | $ 23,939 | 
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- Definition Amount of pro forma revenue of combined entity as if acquisition date of business combination occurred as of beginning of period. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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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. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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