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| 0000912061-18-000015-index.html | 2018-03-27 17:18:31 | |
| 0000912061-18-000015.txt | 2018-03-27 17:18:31 | |
 0000912061-18-000015-xbrl.zip | 275798 | 2018-03-27 17:18:31 |
 chart-582c681860f25365be1.jpg | 74788 | 2018-03-27 17:18:31 |
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| Financial_Report.xlsx | 64963 | 2018-03-27 17:18:31 |
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| nhtc-20171231.xsd | 35123 | 2018-03-27 17:18:31 |
| nhtc-20171231_cal.xml | 89484 | 2018-03-27 17:18:31 |
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| nhtc20171231_10k.htm | 2093948 | 2018-03-27 17:18:31 |
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| q42017ex23-2.htm | 3496 | 2018-03-27 17:18:31 |
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| report.css | 2767 | 2018-03-27 17:18:31 |
| Show.js | 1410 | 2018-03-27 17:18:31 |