Quarterly report pursuant to Section 13 or 15(d)

Segment Information (Schedule Of Revenue Percentage By Product) (Details)

v3.19.2
Segment Information (Schedule Of Revenue Percentage By Product) (Details)
3 Months Ended 6 Months Ended
Jun. 29, 2019
Jun. 30, 2018
Jun. 29, 2019
Jun. 30, 2018
USANA Nutritionals [Member]        
Revenue from External Customer [Line Items]        
Percentage of product revenue 83.00% 82.00% 84.00% 82.00%
USANA Foods [Member]        
Revenue from External Customer [Line Items]        
Percentage of product revenue 9.00% 9.00% 8.00% 9.00%
Personal Care/Skincare [Member]        
Revenue from External Customer [Line Items]        
Percentage of product revenue 7.00% 8.00% 7.00% 8.00%
All Other [Member]        
Revenue from External Customer [Line Items]        
Percentage of product revenue 1.00% 1.00% 1.00% 1.00%