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| 0000788965-19-000008-index.html | 2019-03-13 12:53:38 | |
| 0000788965-19-000008.txt | 2019-03-13 12:53:38 | |
| hnrg-20190311x8k.htm | 32979 | 2019-03-13 12:53:38 |
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| hnrg-20190311xex99_1.htm | 117698 | 2019-03-13 12:53:38 |
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