Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-22-024276-index-headers.html | 2022-10-18 08:00:38 | |
| 0001437749-22-024276-index.html | 2022-10-18 08:00:38 | |
| 0001437749-22-024276.txt | 2022-10-18 08:00:38 | |
 0001437749-22-024276-xbrl.zip | 161741 | 2022-10-18 08:00:38 |
| ex_432342.htm | 959242 | 2022-10-18 08:00:38 |
| ex_432634.htm | 4747 | 2022-10-18 08:00:38 |
| FilingSummary.xml | 1797 | 2022-10-18 08:00:38 |
| Financial_Report.xlsx | 5848 | 2022-10-18 08:00:38 |
| hpe20221014_8k.htm | 36145 | 2022-10-18 08:00:38 |
| hpe20221014_8k_htm.xml | 4315 | 2022-10-18 08:00:38 |
| hpk-20221014.xsd | 3985 | 2022-10-18 08:00:38 |
| hpk-20221014_def.xml | 14205 | 2022-10-18 08:00:38 |
| hpk-20221014_lab.xml | 18618 | 2022-10-18 08:00:38 |
| hpk-20221014_pre.xml | 14282 | 2022-10-18 08:00:38 |
 image01.jpg | 11488 | 2022-10-18 08:00:38 |
| MetaLinks.json | 22519 | 2022-10-18 08:00:38 |
| R1.htm | 45492 | 2022-10-18 08:00:38 |
| report.css | 2767 | 2022-10-18 08:00:38 |
| Show.js | 1085 | 2022-10-18 08:00:38 |