RELATED PARTY TRANSACTIONS (Details) (USD $) In Thousands, unless otherwise specified			12 Months Ended
Dec. 31, 2012 Executives	Dec. 31, 2011 Executives	Dec. 31, 2012 Mr. Eugene Hughes Retirement and Consulting Agreement
RELATED PARTY TRANSACTIONS
Cash surrender value of split-dollar life insurance policies	$ 49	$ 51
Initial term of agreement			8 years
Annual compensation for the first two years of service			215
Specified service period for annual compensation			2 years
Annual compensation for remainder of the initial term			100
Annual compensation after the initial term			$ 50

Represents the annual compensation after the initial term of the agreement entered into with the related party.

No definition available.

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Namespace Prefix:	natr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the annual compensation for remainder of the initial term of the agreement entered into with the related party.

+ References

No definition available.

+ Details

Name:	natr_RelatedPartyTransactionAnnualCompensationForRemainderOfInitialTermOfAgreement
Namespace Prefix:	natr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the annual compensation for specified service period under the agreement entered into with the related party.

+ References

No definition available.

+ Details

Name:	natr_RelatedPartyTransactionAnnualCompensationForSpecifiedServicePeriod
Namespace Prefix:	natr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the initial term of the agreement entered into with the related party.

+ References

No definition available.

+ Details

Name:	natr_RelatedPartyTransactionsInitialTermOfAgreement
Namespace Prefix:	natr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the specified service period for annual compensation under the agreement entered into with the related party.

+ References

No definition available.

+ Details

Name:	natr_RelatedPartyTransactionSpecifiedServicePeriodForAnnualCompensation
Namespace Prefix:	natr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.

+ References

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

-Publisher FASB

-Name FASB Technical Bulletin (FTB)

-Number 85-4

-Paragraph 2

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 4

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6812-107765

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration