Parent Directory| Name | Size | Last Modified |
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| 0001437749-24-015353-index.html | 2024-05-08 16:02:22 | |
| 0001437749-24-015353.txt | 2024-05-08 16:02:22 | |
 0001437749-24-015353-xbrl.zip | 26966 | 2024-05-08 16:02:22 |
| ex_669985.htm | 339149 | 2024-05-08 16:02:22 |
| FilingSummary.xml | 1767 | 2024-05-08 16:02:22 |
| Financial_Report.xlsx | 5838 | 2024-05-08 16:02:22 |
| hpe20240506_8k.htm | 29758 | 2024-05-08 16:02:22 |
| hpe20240506_8k_htm.xml | 4622 | 2024-05-08 16:02:22 |
| hpk-20240508.xsd | 3796 | 2024-05-08 16:02:22 |
| hpk-20240508_def.xml | 13685 | 2024-05-08 16:02:22 |
| hpk-20240508_lab.xml | 17943 | 2024-05-08 16:02:22 |
| hpk-20240508_pre.xml | 13717 | 2024-05-08 16:02:22 |
| MetaLinks.json | 22417 | 2024-05-08 16:02:22 |
 pic1.jpg | 10302 | 2024-05-08 16:02:22 |
| R1.htm | 43980 | 2024-05-08 16:02:22 |
| report.css | 2767 | 2024-05-08 16:02:22 |
| Show.js | 1085 | 2024-05-08 16:02:22 |