Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-20-016301-index-headers.html | 2020-08-03 16:07:39 | |
| 0001437749-20-016301-index.html | 2020-08-03 16:07:39 | |
| 0001437749-20-016301.txt | 2020-08-03 16:07:39 | |
 0001437749-20-016301-xbrl.zip | 147098 | 2020-08-03 16:07:39 |
| ex_190454.htm | 11234 | 2020-08-03 16:07:39 |
| ex_190455.htm | 11080 | 2020-08-03 16:07:39 |
| ex_190456.htm | 11065 | 2020-08-03 16:07:39 |
| ex_190457.htm | 11232 | 2020-08-03 16:07:39 |
| ex_194634.htm | 70929 | 2020-08-03 16:07:39 |
| ex_195715.htm | 3861 | 2020-08-03 16:07:39 |
| FilingSummary.xml | 35988 | 2020-08-03 16:07:39 |
| Financial_Report.xlsx | 61280 | 2020-08-03 16:07:39 |
| hnrg-20200630.xsd | 51400 | 2020-08-03 16:07:39 |
| hnrg-20200630_cal.xml | 49265 | 2020-08-03 16:07:39 |
| hnrg-20200630_def.xml | 372636 | 2020-08-03 16:07:39 |
| hnrg-20200630_lab.xml | 309640 | 2020-08-03 16:07:39 |
| hnrg-20200630_pre.xml | 397859 | 2020-08-03 16:07:39 |
| hnrg20200630_10q.htm | 1023979 | 2020-08-03 16:07:39 |
| hnrg20200630_10q_htm.xml | 635351 | 2020-08-03 16:07:39 |
 logo.jpg | 3779 | 2020-08-03 16:07:39 |
| MetaLinks.json | 539565 | 2020-08-03 16:07:39 |
| R1.htm | 52472 | 2020-08-03 16:07:39 |
| R10.htm | 13855 | 2020-08-03 16:07:39 |
| R11.htm | 38637 | 2020-08-03 16:07:39 |
| R12.htm | 19511 | 2020-08-03 16:07:39 |
| R13.htm | 17460 | 2020-08-03 16:07:39 |
| R14.htm | 24196 | 2020-08-03 16:07:39 |
| R15.htm | 10314 | 2020-08-03 16:07:39 |
| R16.htm | 15715 | 2020-08-03 16:07:39 |
| R17.htm | 30808 | 2020-08-03 16:07:39 |
| R18.htm | 5486 | 2020-08-03 16:07:39 |
| R19.htm | 20885 | 2020-08-03 16:07:39 |
| R2.htm | 108451 | 2020-08-03 16:07:39 |
| R20.htm | 45616 | 2020-08-03 16:07:39 |
| R21.htm | 6081 | 2020-08-03 16:07:39 |
| R22.htm | 5624 | 2020-08-03 16:07:39 |
| R23.htm | 12970 | 2020-08-03 16:07:39 |
| R24.htm | 28901 | 2020-08-03 16:07:39 |
| R25.htm | 18745 | 2020-08-03 16:07:39 |
| R26.htm | 23360 | 2020-08-03 16:07:39 |
| R27.htm | 15852 | 2020-08-03 16:07:39 |
| R28.htm | 30267 | 2020-08-03 16:07:39 |
| R29.htm | 18785 | 2020-08-03 16:07:39 |
| R3.htm | 15827 | 2020-08-03 16:07:39 |
| R30.htm | 43294 | 2020-08-03 16:07:39 |
| R31.htm | 20320 | 2020-08-03 16:07:39 |
| R32.htm | 3152 | 2020-08-03 16:07:39 |
| R33.htm | 10089 | 2020-08-03 16:07:39 |
| R34.htm | 73342 | 2020-08-03 16:07:39 |
| R35.htm | 21790 | 2020-08-03 16:07:39 |
| R36.htm | 11356 | 2020-08-03 16:07:39 |
| R37.htm | 22428 | 2020-08-03 16:07:39 |
| R38.htm | 11433 | 2020-08-03 16:07:39 |
| R39.htm | 12729 | 2020-08-03 16:07:39 |
| R4.htm | 81066 | 2020-08-03 16:07:39 |
| R40.htm | 15190 | 2020-08-03 16:07:39 |
| R41.htm | 3004 | 2020-08-03 16:07:39 |
| R42.htm | 12959 | 2020-08-03 16:07:39 |
| R43.htm | 11154 | 2020-08-03 16:07:39 |
| R44.htm | 6901 | 2020-08-03 16:07:39 |
| R45.htm | 8631 | 2020-08-03 16:07:39 |
| R46.htm | 9030 | 2020-08-03 16:07:39 |
| R47.htm | 8369 | 2020-08-03 16:07:39 |
| R48.htm | 20217 | 2020-08-03 16:07:39 |
| R49.htm | 14248 | 2020-08-03 16:07:39 |
| R5.htm | 115266 | 2020-08-03 16:07:39 |
| R50.htm | 17653 | 2020-08-03 16:07:39 |
| R51.htm | 17451 | 2020-08-03 16:07:39 |
| R52.htm | 27179 | 2020-08-03 16:07:39 |
| R53.htm | 7129 | 2020-08-03 16:07:39 |
| R54.htm | 7523 | 2020-08-03 16:07:39 |
| R6.htm | 43605 | 2020-08-03 16:07:39 |
| R7.htm | 9289 | 2020-08-03 16:07:39 |
| R8.htm | 10023 | 2020-08-03 16:07:39 |
| R9.htm | 5314 | 2020-08-03 16:07:39 |
| report.css | 2767 | 2020-08-03 16:07:39 |
| Show.js | 1085 | 2020-08-03 16:07:39 |