Segment Information (Schedule Of Revenue Percentage By Product) (Details) |
3 Months Ended | |
|---|---|---|
Mar. 31, 2018 |
Apr. 01, 2017 |
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| USANA Nutritionals [Member] | ||
| Revenue from External Customer [Line Items] | ||
| Percentage of product revenue | 83.00% | 85.00% |
| USANA Foods [Member] | ||
| Revenue from External Customer [Line Items] | ||
| Percentage of product revenue | 8.00% | 8.00% |
| Sense - Beautiful Science [Member] | ||
| Revenue from External Customer [Line Items] | ||
| Percentage of product revenue | 4.00% | 6.00% |
| Celavive [Member] | ||
| Revenue from External Customer [Line Items] | ||
| Percentage of product revenue | 4.00% | |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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