Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-23-013574-index-headers.html | 2023-05-10 16:02:46 | |
| 0001437749-23-013574-index.html | 2023-05-10 16:02:46 | |
| 0001437749-23-013574.txt | 2023-05-10 16:02:46 | |
 0001437749-23-013574-xbrl.zip | 26865 | 2023-05-10 16:02:46 |
| ex_517972.htm | 270340 | 2023-05-10 16:02:46 |
| FilingSummary.xml | 1764 | 2023-05-10 16:02:46 |
| Financial_Report.xlsx | 5836 | 2023-05-10 16:02:46 |
| hpe20230508_8k.htm | 30886 | 2023-05-10 16:02:46 |
| hpe20230508_8k_htm.xml | 4230 | 2023-05-10 16:02:46 |
| hpk-20230510.xsd | 3983 | 2023-05-10 16:02:46 |
| hpk-20230510_def.xml | 13816 | 2023-05-10 16:02:46 |
| hpk-20230510_lab.xml | 18064 | 2023-05-10 16:02:46 |
| hpk-20230510_pre.xml | 13838 | 2023-05-10 16:02:46 |
 image01.jpg | 11630 | 2023-05-10 16:02:46 |
| MetaLinks.json | 22592 | 2023-05-10 16:02:46 |
| R1.htm | 43976 | 2023-05-10 16:02:46 |
| report.css | 2767 | 2023-05-10 16:02:46 |
| Show.js | 1085 | 2023-05-10 16:02:46 |