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SEGMENT INFORMATION - Schedule of Revenue Percentage By Product (Details) - Product Concentration Risk - Revenue Benchmark | 12 Months Ended
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Jan. 03, 2026 | Dec. 28, 2024 | Dec. 30, 2023
USANA Nutritionals |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk, percentage | 74.00% | 87.00% | 87.00%
USANA Foods |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk, percentage | 5.00% | 6.00% | 7.00%
Personal care and skincare |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk, percentage | 5.00% | 6.00% | 5.00%
Hiya Nutritional Supplements |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk, percentage | 13.00% | 0.00% | 0.00%
Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk, percentage | 3.00% | 1.00% | 1.00%

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