Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-21-025682-index-headers.html | 2021-11-08 16:01:36 | |
| 0001437749-21-025682-index.html | 2021-11-08 16:01:36 | |
| 0001437749-21-025682.txt | 2021-11-08 16:01:36 | |
 0001437749-21-025682-xbrl.zip | 30458 | 2021-11-08 16:01:36 |
| ex_304172.htm | 429299 | 2021-11-08 16:01:36 |
| FilingSummary.xml | 1819 | 2021-11-08 16:01:36 |
| Financial_Report.xlsx | 5792 | 2021-11-08 16:01:36 |
| hpe20211105_8k.htm | 30251 | 2021-11-08 16:01:36 |
| hpe20211105_8k_htm.xml | 4228 | 2021-11-08 16:01:36 |
| hpk-20211108.xsd | 3975 | 2021-11-08 16:01:36 |
| hpk-20211108_def.xml | 13704 | 2021-11-08 16:01:36 |
| hpk-20211108_lab.xml | 17956 | 2021-11-08 16:01:36 |
| hpk-20211108_pre.xml | 13730 | 2021-11-08 16:01:36 |
 logo.jpg | 10302 | 2021-11-08 16:01:36 |
| MetaLinks.json | 21940 | 2021-11-08 16:01:36 |
| R1.htm | 44534 | 2021-11-08 16:01:36 |
| report.css | 2767 | 2021-11-08 16:01:36 |
| Show.js | 1085 | 2021-11-08 16:01:36 |