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| 0000788965-18-000007-index.html | 2018-03-14 19:16:24 | |
| 0000788965-18-000007.txt | 2018-03-14 19:16:24 | |
| hnrg-20180309x8k.htm | 38214 | 2018-03-14 19:16:24 |
 hnrg-20180309x8kg001.jpg | 3943 | 2018-03-14 19:16:24 |
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| hnrg-20180309xex99.htm | 10594 | 2018-03-14 19:16:24 |