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| 0001437749-22-023470-index.html | 2022-10-03 15:53:36 | |
| 0001437749-22-023470.txt | 2022-10-03 15:53:36 | |
 0001437749-22-023470-xbrl.zip | 14754 | 2022-10-03 15:53:36 |
| ex_428052.htm | 6417 | 2022-10-03 15:53:36 |
| FilingSummary.xml | 1822 | 2022-10-03 15:53:36 |
| Financial_Report.xlsx | 5698 | 2022-10-03 15:53:36 |
| hnrg-20220927.xsd | 3601 | 2022-10-03 15:53:36 |
| hnrg-20220927_def.xml | 11532 | 2022-10-03 15:53:36 |
| hnrg-20220927_lab.xml | 15414 | 2022-10-03 15:53:36 |
| hnrg-20220927_pre.xml | 11688 | 2022-10-03 15:53:36 |
| hnrg20220929_8k.htm | 30277 | 2022-10-03 15:53:36 |
| hnrg20220929_8k_htm.xml | 2563 | 2022-10-03 15:53:36 |
 logo.jpg | 3779 | 2022-10-03 15:53:36 |
| MetaLinks.json | 18921 | 2022-10-03 15:53:36 |
| R1.htm | 38351 | 2022-10-03 15:53:36 |
| report.css | 2767 | 2022-10-03 15:53:36 |
| Show.js | 1085 | 2022-10-03 15:53:36 |