Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-22-016287-index-headers.html | 2022-06-30 16:05:34 | |
| 0001437749-22-016287-index.html | 2022-06-30 16:05:34 | |
| 0001437749-22-016287.txt | 2022-06-30 16:05:34 | |
 0001437749-22-016287-xbrl.zip | 163508 | 2022-06-30 16:05:34 |
| ex_390409.htm | 543830 | 2022-06-30 16:05:34 |
| ex_390410.htm | 90014 | 2022-06-30 16:05:34 |
| ex_390411.htm | 2385 | 2022-06-30 16:05:34 |
| ex_390412.htm | 465380 | 2022-06-30 16:05:34 |
| ex_390413.htm | 38133 | 2022-06-30 16:05:34 |
| ex_390414.htm | 128459 | 2022-06-30 16:05:34 |
| ex_391032.htm | 95910 | 2022-06-30 16:05:34 |
| ex_391823.htm | 11745 | 2022-06-30 16:05:34 |
| FilingSummary.xml | 1981 | 2022-06-30 16:05:34 |
| Financial_Report.xlsx | 5836 | 2022-06-30 16:05:34 |
| hpe20220627_8k.htm | 45160 | 2022-06-30 16:05:34 |
| hpe20220627_8k_htm.xml | 4229 | 2022-06-30 16:05:34 |
| hpk-20220630.xsd | 3983 | 2022-06-30 16:05:34 |
| hpk-20220630_def.xml | 13816 | 2022-06-30 16:05:34 |
| hpk-20220630_lab.xml | 18064 | 2022-06-30 16:05:34 |
| hpk-20220630_pre.xml | 13838 | 2022-06-30 16:05:34 |
 image01.jpg | 8413 | 2022-06-30 16:05:34 |
| MetaLinks.json | 21882 | 2022-06-30 16:05:34 |
| R1.htm | 44494 | 2022-06-30 16:05:34 |
| report.css | 2767 | 2022-06-30 16:05:34 |
| Show.js | 1085 | 2022-06-30 16:05:34 |