Parent Directory| Name | Size | Last Modified |
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| 0001437749-22-011375-index.html | 2022-05-06 17:16:51 | |
| 0001437749-22-011375.txt | 2022-05-06 17:16:51 | |
 0001437749-22-011375-xbrl.zip | 59924 | 2022-05-06 17:16:51 |
| ex_370549.htm | 9394 | 2022-05-06 17:16:51 |
| ex_371480.htm | 48597 | 2022-05-06 17:16:51 |
| ex_371481.htm | 49040 | 2022-05-06 17:16:51 |
| ex_371797.htm | 48197 | 2022-05-06 17:16:51 |
| ex_371798.htm | 48542 | 2022-05-06 17:16:51 |
| FilingSummary.xml | 1944 | 2022-05-06 17:16:51 |
| Financial_Report.xlsx | 5677 | 2022-05-06 17:16:51 |
| hnrg-20220502.xsd | 3600 | 2022-05-06 17:16:51 |
| hnrg-20220502_def.xml | 11531 | 2022-05-06 17:16:51 |
| hnrg-20220502_lab.xml | 15413 | 2022-05-06 17:16:51 |
| hnrg-20220502_pre.xml | 11687 | 2022-05-06 17:16:51 |
| hnrg20220504_8k.htm | 37272 | 2022-05-06 17:16:51 |
| hnrg20220504_8k_htm.xml | 2563 | 2022-05-06 17:16:51 |
 logo.jpg | 3779 | 2022-05-06 17:16:51 |
| MetaLinks.json | 18921 | 2022-05-06 17:16:51 |
| R1.htm | 38956 | 2022-05-06 17:16:51 |
| report.css | 2767 | 2022-05-06 17:16:51 |
| Show.js | 1085 | 2022-05-06 17:16:51 |