| Segment Information (Tables)
 | 9 Months Ended | 
| Sep. 30, 2023 | 
|---|
| Segment Reporting [Abstract] |  | 
| Schedule of Segment Reporting Information, by Segment | These operating segments are included as a component of (“All other”) and are included for purposes of reconciliation of net sales to the Company’s Condensed Consolidated Statements of Comprehensive Income. 
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  | Quarter Ended |  | Nine Months Ended |  
|  | September 30, 2023
 |  | October 1, 2022
 |  | September 30, 2023
 |  | October 1, 2022
 |  
| Net Sales: |  |  |  |  |  |  |  |  
| Direct-selling | $ | 211,932 |  |  | $ | 230,996 |  |  | $ | 695,607 |  |  | $ | 768,337 |  |  
| All other | 1,433 |  |  | 2,304 |  |  | 4,320 |  |  | 2,304 |  |  
| Consolidated Total | $ | 213,365 |  |  | $ | 233,300 |  |  | $ | 699,927 |  |  | $ | 770,641 |  |  | 
| Revenue from External Customers by Products and Services | 
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  | Quarter Ended |  | Nine Months Ended |  
|  | September 30, 2023
 |  | October 1, 2022
 |  | September 30, 2023
 |  | October 1, 2022
 |  
| USANA® Nutritionals | 86 | % |  | 86 | % |  | 87 | % |  | 86 | % |  
| 
USANA Foods(1)
 | 7 | % |  | 7 | % |  | 7 | % |  | 7 | % |  
| Personal care and Skincare | 6 | % |  | 6 | % |  | 5 | % |  | 6 | % |  
| All Other | 1 | % |  | 1 | % |  | 1 | % |  | 1 | % | 
(1)Includes the Company’s Active Nutrition line.
 | 
| Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area | Financial information, presented by geographic region is listed below: 
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  | Quarter Ended |  | Nine Months Ended |  
|  | September 30, 2023
 |  | October 1, 2022
 |  | September 30, 2023
 |  | October 1, 2022
 |  
| Net Sales to External Customers |  |  |  |  |  |  |  |  
| Asia Pacific |  |  |  |  |  |  |  |  
| Greater China | $ | 106,609 |  |  | $ | 109,682 |  |  | $ | 359,178 |  |  | $ | 384,196 |  |  
| Southeast Asia Pacific | 39,151 |  |  | 47,308 |  |  | 124,774 |  |  | 149,880 |  |  
| North Asia | 24,244 |  |  | 25,667 |  |  | 79,381 |  |  | 84,409 |  |  
| Asia Pacific Total | 170,004 |  |  | 182,657 |  |  | 563,333 |  |  | 618,485 |  |  
| Americas and Europe | 43,361 |  |  | 50,643 |  |  | 136,594 |  |  | 152,156 |  |  
| Consolidated Total | $ | 213,365 |  |  | $ | 233,300 |  |  | $ | 699,927 |  |  | $ | 770,641 |  |  | 
| Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas | The following table provides further information on markets representing ten percent or more of consolidated net sales and long-lived assets, respectively: 
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  | Quarter Ended |  | Nine Months Ended |  
|  | September 30, 2023
 |  | October 1, 2022
 |  | September 30, 2023
 |  | October 1, 2022
 |  
| Net sales: |  |  |  |  |  |  |  |  
| China | $ | 94,674 |  |  | $ | 97,443 |  |  | $ | 322,589 |  |  | $ | 346,086 |  |  
| South Korea | $ | 23,745 |  |  | $ | 25,099 |  |  | $ | 77,537 |  |  | $ | 82,439 |  |  
| United States | $ | 22,981 |  |  | $ | 26,942 |  |  | $ | 72,647 |  |  | $ | 79,803 |  | 
|  |  |  |  |  |  |  |  |  |  |  |  |  
|  | As of |  
|  | September 30, 2023
 |  | December 31, 2022
 |  
| Long-lived assets: |  |  |  |  
| United States | $ | 89,026 |  |  | $ | 89,150 |  |  
| China | $ | 76,104 |  |  | $ | 83,938 |  |  |