Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-23-006690-index-headers.html | 2023-03-15 16:02:59 | |
| 0001437749-23-006690-index.html | 2023-03-15 16:02:59 | |
| 0001437749-23-006690.txt | 2023-03-15 16:02:59 | |
 0001437749-23-006690-xbrl.zip | 22889 | 2023-03-15 16:02:59 |
| ex_489087.htm | 144873 | 2023-03-15 16:02:59 |
| FilingSummary.xml | 1764 | 2023-03-15 16:02:59 |
| Financial_Report.xlsx | 5837 | 2023-03-15 16:02:59 |
| hpe20230315_8k.htm | 36177 | 2023-03-15 16:02:59 |
| hpe20230315_8k_htm.xml | 4229 | 2023-03-15 16:02:59 |
| hpk-20230314.xsd | 3983 | 2023-03-15 16:02:59 |
| hpk-20230314_def.xml | 13816 | 2023-03-15 16:02:59 |
| hpk-20230314_lab.xml | 18064 | 2023-03-15 16:02:59 |
| hpk-20230314_pre.xml | 13838 | 2023-03-15 16:02:59 |
| MetaLinks.json | 22592 | 2023-03-15 16:02:59 |
| R1.htm | 43977 | 2023-03-15 16:02:59 |
| report.css | 2767 | 2023-03-15 16:02:59 |
| Show.js | 1085 | 2023-03-15 16:02:59 |