Quarterly report pursuant to Section 13 or 15(d)

Note J - Segment Information - Schedule of Revenue Percentage By Product (Details)

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Note J - Segment Information - Schedule of Revenue Percentage By Product (Details) - Product Concentration Risk [Member] - Revenue Benchmark [Member]
3 Months Ended 6 Months Ended
Jul. 03, 2021
Jun. 27, 2020
Jul. 03, 2021
Jun. 27, 2020
USANA Nutritionals [Member]        
Percentage of product revenue 86.00% 79.00% 87.00% 82.00%
USANA Foods [Member]        
Percentage of product revenue [1] 8.00% 12.00% 7.00% 10.00%
Personal Care and Skincare [Member]        
Percentage of product revenue 5.00% 8.00% 5.00% 7.00%
All Other [Member]        
Percentage of product revenue 1.00% 1.00% 1.00% 1.00%
[1] Includes the Company's new Active Nutrition line, which launched in five markets late in the first quarter of 2021 and will roll out to additional markets throughout the year.