Quarterly report pursuant to Section 13 or 15(d)

Cover Page

Cover Page - shares
6 Months Ended
Jun. 30, 2020
Jul. 24, 2020
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2020  
Document Transition Report false  
Entity File Number 001-34483  
Entity Incorporation, State or Country Code UT  
Entity Tax Identification Number 87-0327982  
Entity Address, Address Line One 2901 Bluegrass Boulevard  
Entity Address, Address Line Two Suite 100  
Entity Address, City or Town Lehi  
Entity Address, State or Province UT  
Entity Address, Postal Zip Code 84043  
City Area Code 801  
Local Phone Number 341-7900  
Title of 12(b) Security Common Stock, no par value  
Trading Symbol NATR  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   19,510,764
Entity Central Index Key 0000275053  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q2