XML 64 R44.htm IDEA: XBRL DOCUMENT
v3.20.1

COMMITMENTS AND CONTINGENCIES (Details) - defendant |  | 12 Months Ended
--- | --- | ---
Jan. 08, 2019 | Dec. 31, 2019
Loss Contingencies [Line Items] |  |
Period to provide termination notice by either party under the employment agreement (equivalent to weeks) |  | 1 month
Securities Class Action | Executive Officers |  |
Loss Contingencies [Line Items] |  |
Number of defendants | 2 |

X
- Definition Employment Agreement, Number of Weeks To Provide Termination Notice by Parties + References No definition available. + Details
Name: | nhtc_EmploymentAgreementNumberofWeeksToProvideTerminationNoticebyParties
Namespace Prefix: | nhtc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of defendants named in a legal action. + References No definition available. + Details
Name: | us-gaap_LossContingencyNumberOfDefendants
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=nhtc_SecuritiesClassActionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=srt_ExecutiveOfficerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |