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| 0000912061-20-000026-index.html | 2020-05-06 09:15:37 | |
| 0000912061-20-000026.txt | 2020-05-06 09:15:37 | |
 0000912061-20-000026-xbrl.zip | 193958 | 2020-05-06 09:15:37 |
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| Financial_Report.xlsx | 51075 | 2020-05-06 09:15:37 |
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| nhtc-20200331.htm | 1209154 | 2020-05-06 09:15:37 |
| nhtc-20200331.xsd | 34335 | 2020-05-06 09:15:37 |
| nhtc-20200331_cal.xml | 68617 | 2020-05-06 09:15:37 |
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| nhtcq12020ex31-210q.htm | 14512 | 2020-05-06 09:15:37 |
| nhtcq12020ex32-110q.htm | 15523 | 2020-05-06 09:15:37 |
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| report.css | 2767 | 2020-05-06 09:15:37 |
| Show.js | 1085 | 2020-05-06 09:15:37 |