XML 55 R43.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Revenue Recognition - Changes in Contract Liabilities (Details) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2018 USD ($)
Change in Contract with Customer, Liability [Roll Forward] |
Outstanding at December 31, 2017 | $ 1,126
Increase (decrease) attributed to: |
Customer loyalty net deferrals | 3,538
Customer loyalty redemptions | (3,342)
Outstanding at September 30, 2018 | $ 1,322

X
- Definition Change in Contract with Customer, Liability [Roll Forward] + References No definition available. + Details
Name: | natr_ChangeinContractwithCustomerLiabilityRollForward
Namespace Prefix: | natr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Increase (Decrease) in Contract Liabilities [Abstract] + References No definition available. + Details
Name: | natr_IncreaseDecreaseinContractLiabilitiesAbstract
Namespace Prefix: | natr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revenue from Contract with Customer. Liability, Increase From Customer Loyalty Net Deferrals + References No definition available. + Details
Name: | natr_RevenuefromContractwithCustomer.LiabilityIncreaseFromCustomerLoyaltyNetDeferrals
Namespace Prefix: | natr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130532-203044 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045 + Details
Name: | us-gaap_ContractWithCustomerLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045 + Details
Name: | us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration