Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-22-004067-index-headers.html | 2022-02-22 16:15:46 | |
| 0001437749-22-004067-index.html | 2022-02-22 16:15:46 | |
| 0001437749-22-004067.txt | 2022-02-22 16:15:46 | |
 0001437749-22-004067-xbrl.zip | 140335 | 2022-02-22 16:15:46 |
| ex_338783.htm | 68510 | 2022-02-22 16:15:46 |
 ex_338783img001.jpg | 6529 | 2022-02-22 16:15:46 |
| ex_338990.htm | 883477 | 2022-02-22 16:15:46 |
| FilingSummary.xml | 1798 | 2022-02-22 16:15:46 |
| Financial_Report.xlsx | 5792 | 2022-02-22 16:15:46 |
| hpe20220221_8k.htm | 44205 | 2022-02-22 16:15:46 |
| hpe20220221_8k_htm.xml | 4229 | 2022-02-22 16:15:46 |
| hpk-20220216.xsd | 3983 | 2022-02-22 16:15:46 |
| hpk-20220216_def.xml | 13816 | 2022-02-22 16:15:46 |
| hpk-20220216_lab.xml | 18064 | 2022-02-22 16:15:46 |
| hpk-20220216_pre.xml | 13838 | 2022-02-22 16:15:46 |
| MetaLinks.json | 21883 | 2022-02-22 16:15:46 |
| R1.htm | 44526 | 2022-02-22 16:15:46 |
| report.css | 2767 | 2022-02-22 16:15:46 |
| Show.js | 1085 | 2022-02-22 16:15:46 |