| Cover | Dec. 23, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K/A |
| Document Period End Date | Dec. 23, 2024 |
| Entity Registrant Name | USANA HEALTH SCIENCES, INC. |
| Entity Incorporation, State or Country Code | UT |
| Entity File Number | 001-35024 |
| Entity Tax Identification Number | 87-0500306 |
| Entity Address, Address Line One | 3838 West Parkway Boulevard |
| Entity Address, City or Town | Salt Lake City |
| Entity Address, State or Province | UT |
| Entity Address, Postal Zip Code | 84120 |
| City Area Code | 801 |
| Local Phone Number | 954-7100 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.001 par value per share |
| Trading Symbol | USNA |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Amendment Flag | true |
| Entity Central Index Key | 0000896264 |
| Amendment Description | EXPLANATORY NOTEThis Amendment No. 1 on Form 8-K/A (this “Amendment”) is being filed by USANA Health Sciences, Inc. (the “Company” or “USANA”) with the U.S. Securities and Exchange Commission (the “SEC”) for the purpose of amending and supplementing Item 9.01 of that certain Current Report on Form 8-K originally filed by the Company with the SEC on December 23, 2024 (the “Original Form 8-K”), in which the Company reported, among other things, USANA’s acquisition of a controlling interest in Hiya Health Products, LLC, a Delaware limited liability company ( “Hiya”), pursuant to an Agreement and Plan of Merger dated December 23, 2024 (the “Merger Agreement”) by and among USANA, Karate Merger Sub, LLC, a Delaware limited liability company and a wholly-owned subsidiary of USANA (“Merger Sub”), Hiya, and Shareholder Representative Services LLC, a Colorado limited liability company, solely in its capacity as the representative of the unitholders of Hiya. Pursuant to the Merger Agreement, Merger Sub merged with and into Hiya, with Hiya continuing as the surviving company. This Amendment amends the Original Form 8-K to provide the audited financial statements and pro forma financial information required by Item 9.01 of Form 8-K that was previously omitted from the Original Form 8-K in reliance on Item 9.01(a)(3) and Item 9.01(b)(2), respectively, of Form 8-K. This Amendment No. 1 does not amend any other item of the Original Form 8-K and all other information previously reported in or filed with the Original Form 8-K (including the other information in Item 9.01) is hereby incorporated by reference in this Amendment. |
