Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-21-023239-index-headers.html | 2021-10-04 17:31:21 | |
| 0001437749-21-023239-index.html | 2021-10-04 17:31:21 | |
| 0001437749-21-023239.txt | 2021-10-04 17:31:21 | |
 0001437749-21-023239-xbrl.zip | 18269 | 2021-10-04 17:31:21 |
| ex_288604.htm | 57463 | 2021-10-04 17:31:21 |
| FilingSummary.xml | 1819 | 2021-10-04 17:31:21 |
| Financial_Report.xlsx | 5793 | 2021-10-04 17:31:21 |
| hpe20211001_8k.htm | 32777 | 2021-10-04 17:31:21 |
| hpe20211001_8k_htm.xml | 4228 | 2021-10-04 17:31:21 |
| hpk-20211004.xsd | 3975 | 2021-10-04 17:31:21 |
| hpk-20211004_def.xml | 13704 | 2021-10-04 17:31:21 |
| hpk-20211004_lab.xml | 17956 | 2021-10-04 17:31:21 |
| hpk-20211004_pre.xml | 13730 | 2021-10-04 17:31:21 |
| MetaLinks.json | 21940 | 2021-10-04 17:31:21 |
| R1.htm | 44534 | 2021-10-04 17:31:21 |
| report.css | 2767 | 2021-10-04 17:31:21 |
| Show.js | 1085 | 2021-10-04 17:31:21 |