Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-22-020832-index-headers.html | 2022-08-17 17:00:27 | |
| 0001437749-22-020832-index.html | 2022-08-17 17:00:27 | |
| 0001437749-22-020832.txt | 2022-08-17 17:00:27 | |
 0001437749-22-020832-xbrl.zip | 11528 | 2022-08-17 17:00:27 |
| ex_414092.htm | 5170 | 2022-08-17 17:00:27 |
| FilingSummary.xml | 1766 | 2022-08-17 17:00:27 |
| Financial_Report.xlsx | 5836 | 2022-08-17 17:00:27 |
| hpe20220817_8k.htm | 31193 | 2022-08-17 17:00:27 |
| hpe20220817_8k_htm.xml | 4230 | 2022-08-17 17:00:27 |
| hpk-20220817.xsd | 3983 | 2022-08-17 17:00:27 |
| hpk-20220817_def.xml | 13816 | 2022-08-17 17:00:27 |
| hpk-20220817_lab.xml | 18064 | 2022-08-17 17:00:27 |
| hpk-20220817_pre.xml | 13838 | 2022-08-17 17:00:27 |
 image01.jpg | 5478 | 2022-08-17 17:00:27 |
| MetaLinks.json | 21998 | 2022-08-17 17:00:27 |
| R1.htm | 43980 | 2022-08-17 17:00:27 |
| report.css | 2767 | 2022-08-17 17:00:27 |
| Show.js | 1085 | 2022-08-17 17:00:27 |