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| 0000799233-22-000063-index.html | 2022-11-09 17:00:54 | |
| 0000799233-22-000063.txt | 2022-11-09 17:00:54 | |
 0000799233-22-000063-xbrl.zip | 456705 | 2022-11-09 17:00:54 |
| creditagreementaugust312022.htm | 1253431 | 2022-11-09 17:00:54 |
| exhibit3112022q3.htm | 14429 | 2022-11-09 17:00:54 |
| exhibit3122022q3.htm | 14526 | 2022-11-09 17:00:54 |
| exhibit3212022q3.htm | 6669 | 2022-11-09 17:00:54 |
| exhibit3222022q3.htm | 7041 | 2022-11-09 17:00:54 |
| FilingSummary.xml | 26294 | 2022-11-09 17:00:54 |
| Financial_Report.xlsx | 68994 | 2022-11-09 17:00:54 |
| htld-20220930.htm | 1234125 | 2022-11-09 17:00:54 |
| htld-20220930.xsd | 46142 | 2022-11-09 17:00:54 |
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| R30.htm | 4672 | 2022-11-09 17:00:54 |
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| report.css | 2767 | 2022-11-09 17:00:54 |
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| stockpurchaseagreementaugu.htm | 813879 | 2022-11-09 17:00:54 |