Quarterly report pursuant to Section 13 or 15(d)

Document And Entity Information

v3.7.0.1
Document And Entity Information - shares
3 Months Ended
Apr. 01, 2017
May 05, 2017
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Apr. 01, 2017  
Document Fiscal Period Focus Q1  
Entity Central Index Key 0000896264  
Entity Registrant Name USANA HEALTH SCIENCES INC  
Current Fiscal Year End Date --12-30  
Document Fiscal Year Focus 2017  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   24,523,449
Trading Symbol usna