Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-22-012741-index-headers.html | 2022-05-17 07:30:27 | |
| 0001437749-22-012741-index.html | 2022-05-17 07:30:27 | |
| 0001437749-22-012741.txt | 2022-05-17 07:30:27 | |
 0001437749-22-012741-xbrl.zip | 10988 | 2022-05-17 07:30:27 |
| ex_376712.htm | 13885 | 2022-05-17 07:30:27 |
| FilingSummary.xml | 1767 | 2022-05-17 07:30:27 |
| Financial_Report.xlsx | 5791 | 2022-05-17 07:30:27 |
| hpe20220512b_8k.htm | 29892 | 2022-05-17 07:30:27 |
| hpe20220512b_8k_htm.xml | 4229 | 2022-05-17 07:30:27 |
| hpk-20220517.xsd | 3983 | 2022-05-17 07:30:27 |
| hpk-20220517_def.xml | 13816 | 2022-05-17 07:30:27 |
| hpk-20220517_lab.xml | 18064 | 2022-05-17 07:30:27 |
| hpk-20220517_pre.xml | 13838 | 2022-05-17 07:30:27 |
| MetaLinks.json | 21886 | 2022-05-17 07:30:27 |
| R1.htm | 44679 | 2022-05-17 07:30:27 |
| report.css | 2767 | 2022-05-17 07:30:27 |
| Show.js | 1085 | 2022-05-17 07:30:27 |
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