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

Represents the consecutive period of time used to assess operating income margins which determine vesting.

No definition available.

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

Represents the first operating margin percentage to be achieved for the vesting of stock options.

No definition available.

Name:	natr_ShareBasedCompensationArrangementByShareBasedPaymentAwardOperatingMarginsOne
Namespace Prefix:	natr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the three operating margin percentage to be achieved for the vesting of stock options.

No definition available.

Name:	natr_ShareBasedCompensationArrangementByShareBasedPaymentAwardOperatingMarginsThree
Namespace Prefix:	natr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the second operating margin percentage to be achieved for the vesting of stock options.

No definition available.

Name:	natr_ShareBasedCompensationArrangementByShareBasedPaymentAwardOperatingMarginsTwo
Namespace Prefix:	natr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901