Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-21-024458-index-headers.html | 2021-10-28 07:31:12 | |
| 0001437749-21-024458-index.html | 2021-10-28 07:31:12 | |
| 0001437749-21-024458.txt | 2021-10-28 07:31:12 | |
 0001437749-21-024458-xbrl.zip | 15078 | 2021-10-28 07:31:12 |
| ex_298246.htm | 20369 | 2021-10-28 07:31:12 |
| FilingSummary.xml | 1819 | 2021-10-28 07:31:12 |
| Financial_Report.xlsx | 5790 | 2021-10-28 07:31:12 |
| hpe20211027_8k.htm | 30776 | 2021-10-28 07:31:12 |
| hpe20211027_8k_htm.xml | 4228 | 2021-10-28 07:31:12 |
| hpk-20211028.xsd | 3976 | 2021-10-28 07:31:12 |
| hpk-20211028_def.xml | 13705 | 2021-10-28 07:31:12 |
| hpk-20211028_lab.xml | 17957 | 2021-10-28 07:31:12 |
| hpk-20211028_pre.xml | 13731 | 2021-10-28 07:31:12 |
 logo.jpg | 11824 | 2021-10-28 07:31:12 |
| MetaLinks.json | 21940 | 2021-10-28 07:31:12 |
| R1.htm | 44533 | 2021-10-28 07:31:12 |
| report.css | 2767 | 2021-10-28 07:31:12 |
| Show.js | 1085 | 2021-10-28 07:31:12 |