Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Segment Information (Schedule Of Revenue Percentage By Product) (Details)
3 Months Ended
Mar. 30, 2019
Mar. 31, 2018
USANA Nutritionals [Member]    
Revenue from External Customer [Line Items]    
Percentage of product revenue 84.00% 83.00%
USANA Foods [Member]    
Revenue from External Customer [Line Items]    
Percentage of product revenue 8.00% 8.00%
Sense - Beautiful Science [Member]    
Revenue from External Customer [Line Items]    
Percentage of product revenue 1.00% 4.00%
Celavive [Member]    
Revenue from External Customer [Line Items]    
Percentage of product revenue 6.00% 4.00%