Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-21-027082-index-headers.html | 2021-11-18 16:11:30 | |
| 0001437749-21-027082-index.html | 2021-11-18 16:11:30 | |
| 0001437749-21-027082.txt | 2021-11-18 16:11:30 | |
 0001437749-21-027082-xbrl.zip | 11661 | 2021-11-18 16:11:30 |
| ex_309642.htm | 5103 | 2021-11-18 16:11:30 |
| FilingSummary.xml | 1819 | 2021-11-18 16:11:30 |
| Financial_Report.xlsx | 5791 | 2021-11-18 16:11:30 |
| hpe20211117_8k.htm | 39044 | 2021-11-18 16:11:30 |
| hpe20211117_8k_htm.xml | 4228 | 2021-11-18 16:11:30 |
| hpk-20211118.xsd | 3976 | 2021-11-18 16:11:30 |
| hpk-20211118_def.xml | 13705 | 2021-11-18 16:11:30 |
| hpk-20211118_lab.xml | 17957 | 2021-11-18 16:11:30 |
| hpk-20211118_pre.xml | 13731 | 2021-11-18 16:11:30 |
 logo.jpg | 10133 | 2021-11-18 16:11:30 |
| MetaLinks.json | 21940 | 2021-11-18 16:11:30 |
| R1.htm | 44533 | 2021-11-18 16:11:30 |
| report.css | 2767 | 2021-11-18 16:11:30 |
| Show.js | 1085 | 2021-11-18 16:11:30 |