Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-22-027260-index-headers.html | 2022-11-14 16:05:09 | |
| 0001437749-22-027260-index.html | 2022-11-14 16:05:09 | |
| 0001437749-22-027260.txt | 2022-11-14 16:05:09 | |
 0001437749-22-027260-xbrl.zip | 28683 | 2022-11-14 16:05:09 |
| ex_447145.htm | 330820 | 2022-11-14 16:05:09 |
| FilingSummary.xml | 1766 | 2022-11-14 16:05:09 |
| Financial_Report.xlsx | 5836 | 2022-11-14 16:05:09 |
| hpe20221114_8k.htm | 31152 | 2022-11-14 16:05:09 |
| hpe20221114_8k_htm.xml | 4230 | 2022-11-14 16:05:09 |
| hpk-20221114.xsd | 3984 | 2022-11-14 16:05:09 |
| hpk-20221114_def.xml | 13817 | 2022-11-14 16:05:09 |
| hpk-20221114_lab.xml | 18065 | 2022-11-14 16:05:09 |
| hpk-20221114_pre.xml | 13839 | 2022-11-14 16:05:09 |
 image01.jpg | 11820 | 2022-11-14 16:05:09 |
| MetaLinks.json | 21998 | 2022-11-14 16:05:09 |
| R1.htm | 43980 | 2022-11-14 16:05:09 |
| report.css | 2767 | 2022-11-14 16:05:09 |
| Show.js | 1085 | 2022-11-14 16:05:09 |