Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-22-023879-index-headers.html | 2022-10-11 07:06:23 | |
| 0001437749-22-023879-index.html | 2022-10-11 07:06:23 | |
| 0001437749-22-023879.txt | 2022-10-11 07:06:23 | |
 0001437749-22-023879-xbrl.zip | 11345 | 2022-10-11 07:06:23 |
| ex_430314.htm | 3647 | 2022-10-11 07:06:23 |
| FilingSummary.xml | 1766 | 2022-10-11 07:06:23 |
| Financial_Report.xlsx | 5835 | 2022-10-11 07:06:23 |
 hpe01.jpg | 8026 | 2022-10-11 07:06:23 |
| hpe20221007_8k.htm | 32340 | 2022-10-11 07:06:23 |
| hpe20221007_8k_htm.xml | 4230 | 2022-10-11 07:06:23 |
| hpk-20221010.xsd | 3983 | 2022-10-11 07:06:23 |
| hpk-20221010_def.xml | 13816 | 2022-10-11 07:06:23 |
| hpk-20221010_lab.xml | 18064 | 2022-10-11 07:06:23 |
| hpk-20221010_pre.xml | 13838 | 2022-10-11 07:06:23 |
| MetaLinks.json | 21998 | 2022-10-11 07:06:23 |
| R1.htm | 43980 | 2022-10-11 07:06:23 |
| report.css | 2767 | 2022-10-11 07:06:23 |
| Show.js | 1085 | 2022-10-11 07:06:23 |