Name:	natr_DeferredCompensationArrangementsMaximumPercentageOfSalaryAndBonusThatMayBeDeferred
Namespace Prefix:	natr_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Represents the period one for the payment of obligation upon separation of employment of the participant under the deferred compensation plan.

No definition available.

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

Represents the period two for the payment of obligation upon separation of employment of the participant under the deferred compensation plan.

No definition available.

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

Represents the period after which employer's contribution vest under the defined contribution plan.

No definition available.

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

- References

No definition available.

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

Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(17))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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

Amount of cost for defined contribution plan.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 70
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480794/715-70-50-1

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

No definition available.