Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-21-020170-index-headers.html | 2021-08-16 16:18:39 | |
| 0001437749-21-020170-index.html | 2021-08-16 16:18:39 | |
| 0001437749-21-020170.txt | 2021-08-16 16:18:39 | |
 0001437749-21-020170-xbrl.zip | 13997 | 2021-08-16 16:18:39 |
| ex_276373.htm | 12324 | 2021-08-16 16:18:39 |
 ex_276373img001.jpg | 6529 | 2021-08-16 16:18:39 |
| FilingSummary.xml | 1819 | 2021-08-16 16:18:39 |
| Financial_Report.xlsx | 5793 | 2021-08-16 16:18:39 |
| hpe20210816_8k.htm | 29539 | 2021-08-16 16:18:39 |
| hpe20210816_8k_htm.xml | 4228 | 2021-08-16 16:18:39 |
| hpk-20210816.xsd | 3975 | 2021-08-16 16:18:39 |
| hpk-20210816_def.xml | 13704 | 2021-08-16 16:18:39 |
| hpk-20210816_lab.xml | 17956 | 2021-08-16 16:18:39 |
| hpk-20210816_pre.xml | 13730 | 2021-08-16 16:18:39 |
| MetaLinks.json | 22052 | 2021-08-16 16:18:39 |
| R1.htm | 44533 | 2021-08-16 16:18:39 |
| report.css | 2767 | 2021-08-16 16:18:39 |
| Show.js | 1085 | 2021-08-16 16:18:39 |