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| 0000788965-18-000018-index.html | 2018-05-21 18:54:05 | |
| 0000788965-18-000018.txt | 2018-05-21 18:54:05 | |
| hnrg-20180521x8k.htm | 43497 | 2018-05-21 18:54:05 |
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| hnrg-20180521xex99_1.htm | 11278 | 2018-05-21 18:54:05 |
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