XML 10 R29.htm IDEA: XBRL DOCUMENT
v3.19.3

REVENUE - Revenue by Market (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Revenue from External Customer [Line Items] |  |  |  |
Net sales | $ 17,023 | $ 47,043 | $ 59,779 | $ 150,320
Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Percentage | 100.00% | 100.00% | 100.00% | 100.00%
Americas |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Net sales | $ 1,445 | $ 1,970 | $ 4,353 | $ 5,361
Americas | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Percentage | 8.50% | 4.20% | 7.30% | 3.60%
Hong Kong |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Net sales | $ 13,575 | $ 41,447 | $ 48,465 | $ 133,681
Hong Kong | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Percentage | 79.70% | 88.10% | 81.00% | 88.90%
China |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Net sales | $ 525 | $ 1,698 | $ 2,138 | $ 5,510
China | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Percentage | 3.10% | 3.60% | 3.60% | 3.70%
Taiwan |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Net sales | $ 649 | $ 935 | $ 2,340 | $ 2,933
Taiwan | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Percentage | 3.80% | 2.00% | 3.90% | 1.90%
South Korea |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Net sales | $ 98 | $ 133 | $ 288 | $ 392
South Korea | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Percentage | 0.60% | 0.30% | 0.50% | 0.30%
Japan |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Net sales | $ 47 | $ 51 | $ 141 | $ 160
Japan | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Percentage | 0.30% | 0.10% | 0.20% | 0.10%
Singapore |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Net sales | $ 13 | $ 52 | $ 43 | $ 134
Singapore | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Percentage | 0.10% | 0.10% | 0.10% | 0.10%
Malaysia |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Net sales | $ 51 | $ 216 | $ 170 | $ 316
Malaysia | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Percentage | 0.30% | 0.50% | 0.30% | 0.20%
Russia and Kazakhstan |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Net sales | $ 244 | $ 184 | $ 662 | $ 626
Russia and Kazakhstan | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Percentage | 1.40% | 0.40% | 1.10% | 0.40%
Europe |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Net sales | $ 343 | $ 357 | $ 1,017 | $ 1,207
Europe | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Percentage | 2.00% | 0.70% | 1.70% | 0.80%
India |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Net sales | $ 33 | $ 0 | $ 162 | $ 0
India | Sales Revenue, Net | Geographic Concentration Risk |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Percentage | 0.20% | 0.00% | 0.30% | 0.00%

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13531-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13537-108611 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
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_EntityWideInformationRevenueFromExternalCustomerLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=us-gaap_GeographicConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=srt_AmericasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_HK
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_CN
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_TW
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_KR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_JP
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_SG
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_MY
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=nhtc_RussiaandKazakhstanDomain
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=srt_EuropeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_IN
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |