Parent Directory| Name | Size | Last Modified |
|---|---|---|
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| 0001437749-22-008860-index.html | 2022-04-13 16:11:29 | |
| 0001437749-22-008860.txt | 2022-04-13 16:11:29 | |
 0001437749-22-008860-xbrl.zip | 11257 | 2022-04-13 16:11:29 |
 a01.jpg | 6529 | 2022-04-13 16:11:29 |
| ex_358275.htm | 3698 | 2022-04-13 16:11:29 |
| FilingSummary.xml | 1764 | 2022-04-13 16:11:29 |
| Financial_Report.xlsx | 5791 | 2022-04-13 16:11:29 |
| hpe20220413_8k.htm | 29282 | 2022-04-13 16:11:29 |
| hpe20220413_8k_htm.xml | 4230 | 2022-04-13 16:11:29 |
| hpk-20220413.xsd | 3983 | 2022-04-13 16:11:29 |
| hpk-20220413_def.xml | 13816 | 2022-04-13 16:11:29 |
| hpk-20220413_lab.xml | 18064 | 2022-04-13 16:11:29 |
| hpk-20220413_pre.xml | 13838 | 2022-04-13 16:11:29 |
| MetaLinks.json | 21998 | 2022-04-13 16:11:29 |
| R1.htm | 44681 | 2022-04-13 16:11:29 |
| report.css | 2767 | 2022-04-13 16:11:29 |
| Show.js | 1085 | 2022-04-13 16:11:29 |