Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000799233-17-000049-index-headers.html | 2017-11-09 17:20:26 | |
| 0000799233-17-000049-index.html | 2017-11-09 17:20:26 | |
| 0000799233-17-000049.txt | 2017-11-09 17:20:26 | |
 0000799233-17-000049-xbrl.zip | 253013 | 2017-11-09 17:20:26 |
| exhibit21stockpurchase.htm | 524446 | 2017-11-09 17:20:26 |
| exhibit3112017q3.htm | 23574 | 2017-11-09 17:20:26 |
| exhibit3122017q3.htm | 24724 | 2017-11-09 17:20:26 |
| exhibit31articlesofinc.htm | 47212 | 2017-11-09 17:20:26 |
| exhibit3212017q3.htm | 9723 | 2017-11-09 17:20:26 |
| exhibit3222017q3.htm | 10608 | 2017-11-09 17:20:26 |
| exhibit32amendedandres.htm | 70211 | 2017-11-09 17:20:26 |
| FilingSummary.xml | 26585 | 2017-11-09 17:20:26 |
| Financial_Report.xlsx | 55045 | 2017-11-09 17:20:26 |
| htld-20170930.xsd | 33001 | 2017-11-09 17:20:26 |
| htld-20170930_cal.xml | 60238 | 2017-11-09 17:20:26 |
| htld-20170930_def.xml | 149304 | 2017-11-09 17:20:26 |
| htld-20170930_lab.xml | 509853 | 2017-11-09 17:20:26 |
| htld-20170930_pre.xml | 291687 | 2017-11-09 17:20:26 |
| htld2017q310q.htm | 1022858 | 2017-11-09 17:20:26 |
| htld2017q310q_htm.xml | 642263 | 2017-11-09 17:20:26 |
| MetaLinks.json | 435491 | 2017-11-09 17:20:26 |
| R1.htm | 20523 | 2017-11-09 17:20:26 |
| R10.htm | 5207 | 2017-11-09 17:20:26 |
| R11.htm | 7266 | 2017-11-09 17:20:26 |
| R12.htm | 6614 | 2017-11-09 17:20:26 |
| R13.htm | 42712 | 2017-11-09 17:20:26 |
| R14.htm | 28274 | 2017-11-09 17:20:26 |
| R15.htm | 46999 | 2017-11-09 17:20:26 |
| R16.htm | 7882 | 2017-11-09 17:20:26 |
| R17.htm | 50157 | 2017-11-09 17:20:26 |
| R18.htm | 9432 | 2017-11-09 17:20:26 |
| R19.htm | 24784 | 2017-11-09 17:20:26 |
| R2.htm | 99377 | 2017-11-09 17:20:26 |
| R20.htm | 9020 | 2017-11-09 17:20:26 |
| R21.htm | 26087 | 2017-11-09 17:20:26 |
| R22.htm | 5497 | 2017-11-09 17:20:26 |
| R23.htm | 4357 | 2017-11-09 17:20:26 |
| R24.htm | 48783 | 2017-11-09 17:20:26 |
| R25.htm | 42284 | 2017-11-09 17:20:26 |
| R26.htm | 27208 | 2017-11-09 17:20:26 |
| R27.htm | 45432 | 2017-11-09 17:20:26 |
| R28.htm | 44948 | 2017-11-09 17:20:26 |
| R29.htm | 12017 | 2017-11-09 17:20:26 |
| R3.htm | 19467 | 2017-11-09 17:20:26 |
| R30.htm | 23874 | 2017-11-09 17:20:26 |
| R31.htm | 4452 | 2017-11-09 17:20:26 |
| R32.htm | 16258 | 2017-11-09 17:20:26 |
| R33.htm | 12343 | 2017-11-09 17:20:26 |
| R34.htm | 81215 | 2017-11-09 17:20:26 |
| R35.htm | 33900 | 2017-11-09 17:20:26 |
| R36.htm | 5385 | 2017-11-09 17:20:26 |
| R37.htm | 24892 | 2017-11-09 17:20:26 |
| R38.htm | 9289 | 2017-11-09 17:20:26 |
| R39.htm | 43641 | 2017-11-09 17:20:26 |
| R4.htm | 64162 | 2017-11-09 17:20:26 |
| R40.htm | 20898 | 2017-11-09 17:20:26 |
| R41.htm | 42572 | 2017-11-09 17:20:26 |
| R42.htm | 10733 | 2017-11-09 17:20:26 |
| R43.htm | 23585 | 2017-11-09 17:20:26 |
| R44.htm | 4523 | 2017-11-09 17:20:26 |
| R5.htm | 18010 | 2017-11-09 17:20:26 |
| R6.htm | 3209 | 2017-11-09 17:20:26 |
| R7.htm | 74589 | 2017-11-09 17:20:26 |
| R8.htm | 19255 | 2017-11-09 17:20:26 |
| R9.htm | 5409 | 2017-11-09 17:20:26 |
| report.css | 2767 | 2017-11-09 17:20:26 |
| Show.js | 1410 | 2017-11-09 17:20:26 |