Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-22-017143-index-headers.html | 2022-07-14 16:02:34 | |
| 0001437749-22-017143-index.html | 2022-07-14 16:02:34 | |
| 0001437749-22-017143.txt | 2022-07-14 16:02:34 | |
 0001437749-22-017143-xbrl.zip | 11243 | 2022-07-14 16:02:34 |
| ex_395127.htm | 3689 | 2022-07-14 16:02:34 |
| FilingSummary.xml | 1764 | 2022-07-14 16:02:34 |
| Financial_Report.xlsx | 5836 | 2022-07-14 16:02:34 |
| hpe20220713_8k.htm | 29070 | 2022-07-14 16:02:34 |
| hpe20220713_8k_htm.xml | 4230 | 2022-07-14 16:02:34 |
| hpk-20220714.xsd | 3983 | 2022-07-14 16:02:34 |
| hpk-20220714_def.xml | 13816 | 2022-07-14 16:02:34 |
| hpk-20220714_lab.xml | 18064 | 2022-07-14 16:02:34 |
| hpk-20220714_pre.xml | 13838 | 2022-07-14 16:02:34 |
 image1.jpg | 11185 | 2022-07-14 16:02:34 |
| MetaLinks.json | 21998 | 2022-07-14 16:02:34 |
| R1.htm | 44494 | 2022-07-14 16:02:34 |
| report.css | 2767 | 2022-07-14 16:02:34 |
| Show.js | 1085 | 2022-07-14 16:02:34 |