Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-22-021898-index-headers.html | 2022-09-06 16:07:36 | |
| 0001437749-22-021898-index.html | 2022-09-06 16:07:36 | |
| 0001437749-22-021898.txt | 2022-09-06 16:07:36 | |
 0001437749-22-021898-xbrl.zip | 30770 | 2022-09-06 16:07:36 |
| ex_420008.htm | 464351 | 2022-09-06 16:07:36 |
| FilingSummary.xml | 1766 | 2022-09-06 16:07:36 |
| Financial_Report.xlsx | 5831 | 2022-09-06 16:07:36 |
| hpe20220903_8k.htm | 31353 | 2022-09-06 16:07:36 |
| hpe20220903_8k_htm.xml | 4217 | 2022-09-06 16:07:36 |
| hpk-20220906.xsd | 3982 | 2022-09-06 16:07:36 |
| hpk-20220906_def.xml | 13815 | 2022-09-06 16:07:36 |
| hpk-20220906_lab.xml | 18063 | 2022-09-06 16:07:36 |
| hpk-20220906_pre.xml | 13837 | 2022-09-06 16:07:36 |
| MetaLinks.json | 21998 | 2022-09-06 16:07:36 |
| R1.htm | 43968 | 2022-09-06 16:07:36 |
| report.css | 2767 | 2022-09-06 16:07:36 |
| Show.js | 1085 | 2022-09-06 16:07:36 |