Parent Directory| Name | Size | Last Modified |
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| 0001437749-23-030383-index.html | 2023-11-06 16:02:26 | |
| 0001437749-23-030383.txt | 2023-11-06 16:02:26 | |
 0001437749-23-030383-xbrl.zip | 196748 | 2023-11-06 16:02:26 |
| ex_590946.htm | 1063899 | 2023-11-06 16:02:26 |
| ex_592089.htm | 464143 | 2023-11-06 16:02:26 |
 ex_592089img001.jpg | 6529 | 2023-11-06 16:02:26 |
| FilingSummary.xml | 1764 | 2023-11-06 16:02:26 |
| Financial_Report.xlsx | 5839 | 2023-11-06 16:02:26 |
| hpe20231103_8k.htm | 39789 | 2023-11-06 16:02:26 |
| hpe20231103_8k_htm.xml | 4221 | 2023-11-06 16:02:26 |
| hpk-20231101.xsd | 3797 | 2023-11-06 16:02:26 |
| hpk-20231101_def.xml | 13686 | 2023-11-06 16:02:26 |
| hpk-20231101_lab.xml | 17944 | 2023-11-06 16:02:26 |
| hpk-20231101_pre.xml | 13718 | 2023-11-06 16:02:26 |
| MetaLinks.json | 22417 | 2023-11-06 16:02:26 |
| R1.htm | 43978 | 2023-11-06 16:02:26 |
| report.css | 2767 | 2023-11-06 16:02:26 |
| Show.js | 1085 | 2023-11-06 16:02:26 |