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| 0001437749-23-021713-index.html | 2023-08-02 20:02:03 | |
| 0001437749-23-021713.txt | 2023-08-02 20:02:03 | |
 0001437749-23-021713-xbrl.zip | 14803 | 2023-08-02 20:02:03 |
| ex_218622.htm | 6131 | 2023-08-02 20:02:03 |
| FilingSummary.xml | 2087 | 2023-08-02 20:02:03 |
| Financial_Report.xlsx | 5699 | 2023-08-02 20:02:03 |
| hnrg-20230802.xsd | 3409 | 2023-08-02 20:02:03 |
| hnrg-20230802_def.xml | 11424 | 2023-08-02 20:02:03 |
| hnrg-20230802_lab.xml | 15310 | 2023-08-02 20:02:03 |
| hnrg-20230802_pre.xml | 11584 | 2023-08-02 20:02:03 |
| hnrg20201221_8k.htm | 26923 | 2023-08-02 20:02:03 |
| hnrg20201221_8k_htm.xml | 2561 | 2023-08-02 20:02:03 |
 logo.jpg | 3779 | 2023-08-02 20:02:03 |
| MetaLinks.json | 19330 | 2023-08-02 20:02:03 |
 prlogo.jpg | 7825 | 2023-08-02 20:02:03 |
| R1.htm | 38350 | 2023-08-02 20:02:03 |
| report.css | 2767 | 2023-08-02 20:02:03 |
| Show.js | 1085 | 2023-08-02 20:02:03 |