| Document And Entity Information | May 05, 2021 |
| Document Information [Line Items] | |
| Entity, Registrant Name | NATURAL HEALTH TRENDS CORP. |
| Document, Type | 8-K |
| Document, Period End Date | May 5, 2021 |
| Entity, Incorporation, State or Country Code | DE |
| Entity, File Number | 001-36849 |
| Entity, Tax Identification Number | 59-2705336 |
| Entity, Address, Address Line One | Units 1205-07, 12F, Mira Place Tower A |
| Entity, Address, Address Line Two | 132 Nathan Road |
| Entity, Address, Address Line Three | Tsimshatsui |
| Entity, Address, City or Town | Kowloon |
| Entity, Address, Country | HK |
| City Area Code | 852 |
| Local Phone Number | 3107-0800 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity, Emerging Growth Company | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | NHTC |
| Security Exchange Name | NASDAQ |
| Amendment Flag | false |
| Entity, Central Index Key | 0000912061 |
