Segment Information (Schedule Of Revenue Percentage By Product) (Details) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2017 |
Oct. 01, 2016 |
Sep. 30, 2017 |
Oct. 01, 2016 |
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| USANA Nutritionals [Member] | ||||
| Revenue from External Customer [Line Items] | ||||
| Percentage of product revenue | 83.00% | 85.00% | 84.00% | 83.00% |
| USANA Foods [Member] | ||||
| Revenue from External Customer [Line Items] | ||||
| Percentage of product revenue | 9.00% | 8.00% | 9.00% | 10.00% |
| Sense - Beautiful Science [Member] | ||||
| Revenue from External Customer [Line Items] | ||||
| Percentage of product revenue | 6.00% | 6.00% | 6.00% | 6.00% |
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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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