Intangible Assets (Schedule Of Finite And Indefinite Lived Intangible Assets) (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |
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Jan. 03, 2015
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Dec. 28, 2013
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Schedule Of Finite and Indefinite Intangible Assets [Line Items] | ||
Amortized intangible assets, Net carrying amount | $ 2,376us-gaap_FiniteLivedIntangibleAssetsNet | |
Unamortized intangible assets | 38,576us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill | 39,462us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill |
Total, Gross carrying amount | 42,850us-gaap_IntangibleAssetsGrossExcludingGoodwill | 43,834us-gaap_IntangibleAssetsGrossExcludingGoodwill |
Total, Net carrying amount | 40,952us-gaap_IntangibleAssetsNetExcludingGoodwill | 42,329us-gaap_IntangibleAssetsNetExcludingGoodwill |
Trade Name And Trademarks [Member] | ||
Schedule Of Finite and Indefinite Intangible Assets [Line Items] | ||
Amortized intangible assets, Gross carrying amount |
4,274us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = usna_TradeNameAndTrademarksMember |
4,372us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = usna_TradeNameAndTrademarksMember |
Accumulated amortization |
(1,898)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = usna_TradeNameAndTrademarksMember |
(1,505)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = usna_TradeNameAndTrademarksMember |
Amortized intangible assets, Net carrying amount |
2,376us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = usna_TradeNameAndTrademarksMember |
2,867us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = usna_TradeNameAndTrademarksMember |
Weighted-average amortization period (years) | 10 years | 10 years |
Product Formulas [Member] | ||
Schedule Of Finite and Indefinite Intangible Assets [Line Items] | ||
Unamortized intangible assets |
9,425us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TradeSecretsMember |
9,641us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TradeSecretsMember |
Direct Sales License [Member] | ||
Schedule Of Finite and Indefinite Intangible Assets [Line Items] | ||
Unamortized intangible assets |
$ 29,151us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LicensingAgreementsMember |
$ 29,821us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LicensingAgreementsMember |
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- Definition
Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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- Definition
Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before accumulated amortization of intangible assets, excluding goodwill. No definition available.
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- Definition
Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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