Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-21-028739-index-headers.html | 2021-12-16 16:01:17 | |
| 0001437749-21-028739-index.html | 2021-12-16 16:01:17 | |
| 0001437749-21-028739.txt | 2021-12-16 16:01:17 | |
 0001437749-21-028739-xbrl.zip | 22570 | 2021-12-16 16:01:17 |
| ex_317150.htm | 210820 | 2021-12-16 16:01:17 |
| FilingSummary.xml | 1819 | 2021-12-16 16:01:17 |
| Financial_Report.xlsx | 5804 | 2021-12-16 16:01:17 |
| hpe20211216_8k.htm | 30239 | 2021-12-16 16:01:17 |
| hpe20211216_8k_htm.xml | 4315 | 2021-12-16 16:01:17 |
| hpk-20211216.xsd | 3976 | 2021-12-16 16:01:17 |
| hpk-20211216_def.xml | 14088 | 2021-12-16 16:01:17 |
| hpk-20211216_lab.xml | 18505 | 2021-12-16 16:01:17 |
| hpk-20211216_pre.xml | 14169 | 2021-12-16 16:01:17 |
| MetaLinks.json | 22343 | 2021-12-16 16:01:17 |
| R1.htm | 46068 | 2021-12-16 16:01:17 |
| report.css | 2767 | 2021-12-16 16:01:17 |
| Show.js | 1085 | 2021-12-16 16:01:17 |