Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-22-003178-index-headers.html | 2022-02-14 07:30:23 | |
| 0001437749-22-003178-index.html | 2022-02-14 07:30:23 | |
| 0001437749-22-003178.txt | 2022-02-14 07:30:23 | |
 0001437749-22-003178-xbrl.zip | 155240 | 2022-02-14 07:30:23 |
| ex_335022.htm | 1050563 | 2022-02-14 07:30:23 |
| FilingSummary.xml | 1765 | 2022-02-14 07:30:23 |
| Financial_Report.xlsx | 5793 | 2022-02-14 07:30:23 |
| hpe20220211_8k.htm | 31838 | 2022-02-14 07:30:23 |
| hpe20220211_8k_htm.xml | 4228 | 2022-02-14 07:30:23 |
| hpk-20220209.xsd | 3975 | 2022-02-14 07:30:23 |
| hpk-20220209_def.xml | 13704 | 2022-02-14 07:30:23 |
| hpk-20220209_lab.xml | 17956 | 2022-02-14 07:30:23 |
| hpk-20220209_pre.xml | 13730 | 2022-02-14 07:30:23 |
| MetaLinks.json | 21825 | 2022-02-14 07:30:23 |
| R1.htm | 44536 | 2022-02-14 07:30:23 |
| report.css | 2767 | 2022-02-14 07:30:23 |
| Show.js | 1085 | 2022-02-14 07:30:23 |