Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-23-005529-index-headers.html | 2023-03-06 16:05:30 | |
| 0001437749-23-005529-index.html | 2023-03-06 16:05:30 | |
| 0001437749-23-005529.txt | 2023-03-06 16:05:30 | |
 0001437749-23-005529-xbrl.zip | 33002 | 2023-03-06 16:05:30 |
| ex_484423.htm | 435545 | 2023-03-06 16:05:30 |
 ex_484423img001.jpg | 6529 | 2023-03-06 16:05:30 |
| FilingSummary.xml | 1764 | 2023-03-06 16:05:30 |
| Financial_Report.xlsx | 5838 | 2023-03-06 16:05:30 |
| hpe20230303_8k.htm | 31069 | 2023-03-06 16:05:30 |
| hpe20230303_8k_htm.xml | 4230 | 2023-03-06 16:05:30 |
| hpk-20230306.xsd | 3982 | 2023-03-06 16:05:30 |
| hpk-20230306_def.xml | 13815 | 2023-03-06 16:05:30 |
| hpk-20230306_lab.xml | 18063 | 2023-03-06 16:05:30 |
| hpk-20230306_pre.xml | 13837 | 2023-03-06 16:05:30 |
| MetaLinks.json | 22592 | 2023-03-06 16:05:30 |
| R1.htm | 43979 | 2023-03-06 16:05:30 |
| report.css | 2767 | 2023-03-06 16:05:30 |
| Show.js | 1085 | 2023-03-06 16:05:30 |