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| 0001437749-22-024532.txt | 2022-10-21 16:45:39 | |
 0001437749-22-024532-xbrl.zip | 17355 | 2022-10-21 16:45:39 |
| ex_432613.htm | 11526 | 2022-10-21 16:45:39 |
| FilingSummary.xml | 1822 | 2022-10-21 16:45:39 |
| Financial_Report.xlsx | 5698 | 2022-10-21 16:45:39 |
| hnrg-20221021.xsd | 3602 | 2022-10-21 16:45:39 |
| hnrg-20221021_def.xml | 11533 | 2022-10-21 16:45:39 |
| hnrg-20221021_lab.xml | 15415 | 2022-10-21 16:45:39 |
| hnrg-20221021_pre.xml | 11689 | 2022-10-21 16:45:39 |
| hnrg20221017_8k.htm | 35722 | 2022-10-21 16:45:39 |
| hnrg20221017_8k_htm.xml | 2563 | 2022-10-21 16:45:39 |
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| R1.htm | 38352 | 2022-10-21 16:45:39 |
| report.css | 2767 | 2022-10-21 16:45:39 |
| Show.js | 1085 | 2022-10-21 16:45:39 |