Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-22-014028-index-headers.html | 2022-06-01 16:02:25 | |
| 0001437749-22-014028-index.html | 2022-06-01 16:02:25 | |
| 0001437749-22-014028.txt | 2022-06-01 16:02:25 | |
 0001437749-22-014028-xbrl.zip | 10572 | 2022-06-01 16:02:25 |
| FilingSummary.xml | 1733 | 2022-06-01 16:02:25 |
| Financial_Report.xlsx | 5793 | 2022-06-01 16:02:25 |
| hpe20220601_8k.htm | 39952 | 2022-06-01 16:02:25 |
| hpe20220601_8k_htm.xml | 4230 | 2022-06-01 16:02:25 |
| hpk-20220601.xsd | 3982 | 2022-06-01 16:02:25 |
| hpk-20220601_def.xml | 13815 | 2022-06-01 16:02:25 |
| hpk-20220601_lab.xml | 18063 | 2022-06-01 16:02:25 |
| hpk-20220601_pre.xml | 13837 | 2022-06-01 16:02:25 |
| MetaLinks.json | 21998 | 2022-06-01 16:02:25 |
| R1.htm | 44682 | 2022-06-01 16:02:25 |
| report.css | 2767 | 2022-06-01 16:02:25 |
| Show.js | 1084 | 2022-06-01 16:02:25 |