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| 0001437749-22-020174.txt | 2022-08-11 17:11:43 | |
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| ex_410273.htm | 39658 | 2022-08-11 17:11:43 |
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| ex_410275.htm | 43773 | 2022-08-11 17:11:43 |
| FilingSummary.xml | 1882 | 2022-08-11 17:11:43 |
| Financial_Report.xlsx | 5699 | 2022-08-11 17:11:43 |
| hnrg-20220805.xsd | 3601 | 2022-08-11 17:11:43 |
| hnrg-20220805_def.xml | 11532 | 2022-08-11 17:11:43 |
| hnrg-20220805_lab.xml | 15414 | 2022-08-11 17:11:43 |
| hnrg-20220805_pre.xml | 11688 | 2022-08-11 17:11:43 |
| hnrg20220805_8k.htm | 35772 | 2022-08-11 17:11:43 |
| hnrg20220805_8k_htm.xml | 2563 | 2022-08-11 17:11:43 |
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| report.css | 2767 | 2022-08-11 17:11:43 |
| Show.js | 1085 | 2022-08-11 17:11:43 |