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INCOME TAXES (Details 4) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Commissions and transfer pricing
Anticipated change in unrecognized tax benefits
Change in unrecognized tax benefits within the next twelve months, minimum	$ 800us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeLowerBound / us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis = natr_CommissionsAndTransferPricingMember
Change in unrecognized tax benefits within the next twelve months, maximum	1,200us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeUpperBound / us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis = natr_CommissionsAndTransferPricingMember
Audits or the expiration of statutes of limitations in various foreign jurisdictions
Anticipated change in unrecognized tax benefits
Change in unrecognized tax benefits within the next twelve months, minimum	100us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeLowerBound / us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis = natr_CloseOfAuditsOrExpirationOfStatutesOfLimitationsInForeignJurisdictionsMember
Change in unrecognized tax benefits within the next twelve months, maximum	$ 300us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeUpperBound / us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis = natr_CloseOfAuditsOrExpirationOfStatutesOfLimitationsInForeignJurisdictionsMember

X

- Definition

The estimated lower bound of the reasonably possible change in the total amount of the unrecognized tax benefit (that will significantly increase or decrease within twelve months of the balance sheet date) for a tax position taken.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

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X

- Definition

The estimated upper bound of the reasonably possible change in the total amount of the unrecognized tax benefit (that will significantly increase or decrease within twelve months of the balance sheet date) for a tax position taken.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

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