Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-25-012116-index-headers.html | 2025-04-16 06:31:00 | |
| 0001437749-25-012116-index.html | 2025-04-16 06:31:00 | |
| 0001437749-25-012116.txt | 2025-04-16 06:31:00 | |
 0001437749-25-012116-xbrl.zip | 73200 | 2025-04-16 06:31:00 |
| FilingSummary.xml | 2350 | 2025-04-16 06:31:00 |
| hpe20250409_def14a.htm | 441417 | 2025-04-16 06:31:00 |
| hpe20250409_def14a_htm.xml | 1355 | 2025-04-16 06:31:00 |
| hpk-20241231.xsd | 4096 | 2025-04-16 06:31:00 |
| hpk-20241231_def.xml | 1750 | 2025-04-16 06:31:00 |
| hpk-20241231_lab.xml | 1775 | 2025-04-16 06:31:00 |
| hpk-20241231_pre.xml | 714 | 2025-04-16 06:31:00 |
 logobig.jpg | 22372 | 2025-04-16 06:31:00 |
| MetaLinks.json | 170710 | 2025-04-16 06:31:00 |
| R1.htm | 10828 | 2025-04-16 06:31:00 |
| R2.htm | 4369 | 2025-04-16 06:31:00 |
| report.css | 2767 | 2025-04-16 06:31:00 |
| Show.js | 1085 | 2025-04-16 06:31:00 |