Quarterly report pursuant to Section 13 or 15(d)

Segment Information (Percentage Of Total Product Revenue Contributed By Company's Nutritional And Care Products) (Details)

v2.4.0.8
Segment Information (Percentage Of Total Product Revenue Contributed By Company's Nutritional And Care Products) (Details)
3 Months Ended 9 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 27, 2014
Sep. 28, 2013
USANA Nutritionals [Member]
       
Revenue from External Customer [Line Items]        
Percentage of product revenue 78.00% 79.00% 79.00% 80.00%
USANA Foods [Member]
       
Revenue from External Customer [Line Items]        
Percentage of product revenue 13.00% 13.00% 13.00% 12.00%
Sense - Beautiful Science [Member]
       
Revenue from External Customer [Line Items]        
Percentage of product revenue 7.00% 6.00% 7.00% 6.00%