Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-22-028930-index-headers.html | 2022-12-12 17:15:04 | |
| 0001437749-22-028930-index.html | 2022-12-12 17:15:04 | |
| 0001437749-22-028930.txt | 2022-12-12 17:15:04 | |
 0001437749-22-028930-xbrl.zip | 135951 | 2022-12-12 17:15:04 |
| ex_455400.htm | 1060504 | 2022-12-12 17:15:04 |
| FilingSummary.xml | 1766 | 2022-12-12 17:15:04 |
| Financial_Report.xlsx | 5835 | 2022-12-12 17:15:04 |
| hpe20221212_8k.htm | 38045 | 2022-12-12 17:15:04 |
| hpe20221212_8k_htm.xml | 4229 | 2022-12-12 17:15:04 |
| hpk-20221212.xsd | 3984 | 2022-12-12 17:15:04 |
| hpk-20221212_def.xml | 13817 | 2022-12-12 17:15:04 |
| hpk-20221212_lab.xml | 18065 | 2022-12-12 17:15:04 |
| hpk-20221212_pre.xml | 13839 | 2022-12-12 17:15:04 |
| MetaLinks.json | 21882 | 2022-12-12 17:15:04 |
| R1.htm | 43979 | 2022-12-12 17:15:04 |
| report.css | 2767 | 2022-12-12 17:15:04 |
| Show.js | 1085 | 2022-12-12 17:15:04 |