Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-22-019358-index-headers.html | 2022-08-08 16:06:53 | |
| 0001437749-22-019358-index.html | 2022-08-08 16:06:53 | |
| 0001437749-22-019358.txt | 2022-08-08 16:06:53 | |
 0001437749-22-019358-xbrl.zip | 200965 | 2022-08-08 16:06:53 |
| ex_399023.htm | 11920 | 2022-08-08 16:06:53 |
| ex_399024.htm | 11917 | 2022-08-08 16:06:53 |
| ex_399025.htm | 5032 | 2022-08-08 16:06:53 |
| ex_399026.htm | 4913 | 2022-08-08 16:06:53 |
| FilingSummary.xml | 41761 | 2022-08-08 16:06:53 |
| Financial_Report.xlsx | 91145 | 2022-08-08 16:06:53 |
| hpe20220630_10q.htm | 1384994 | 2022-08-08 16:06:53 |
| hpe20220630_10q_htm.xml | 1017675 | 2022-08-08 16:06:53 |
| hpk-20220630.xsd | 71531 | 2022-08-08 16:06:53 |
| hpk-20220630_cal.xml | 56738 | 2022-08-08 16:06:53 |
| hpk-20220630_def.xml | 530413 | 2022-08-08 16:06:53 |
| hpk-20220630_lab.xml | 428383 | 2022-08-08 16:06:53 |
| hpk-20220630_pre.xml | 560617 | 2022-08-08 16:06:53 |
| MetaLinks.json | 773572 | 2022-08-08 16:06:53 |
| R1.htm | 58445 | 2022-08-08 16:06:53 |
| R10.htm | 5494 | 2022-08-08 16:06:53 |
| R11.htm | 61949 | 2022-08-08 16:06:53 |
| R12.htm | 52517 | 2022-08-08 16:06:53 |
| R13.htm | 10889 | 2022-08-08 16:06:53 |
| R14.htm | 24909 | 2022-08-08 16:06:53 |
| R15.htm | 11896 | 2022-08-08 16:06:53 |
| R16.htm | 42702 | 2022-08-08 16:06:53 |
| R17.htm | 20358 | 2022-08-08 16:06:53 |
| R18.htm | 7743 | 2022-08-08 16:06:53 |
| R19.htm | 5482 | 2022-08-08 16:06:53 |
| R2.htm | 105418 | 2022-08-08 16:06:53 |
| R20.htm | 63417 | 2022-08-08 16:06:53 |
| R21.htm | 32683 | 2022-08-08 16:06:53 |
| R22.htm | 13339 | 2022-08-08 16:06:53 |
| R23.htm | 6314 | 2022-08-08 16:06:53 |
| R24.htm | 100388 | 2022-08-08 16:06:53 |
| R25.htm | 14044 | 2022-08-08 16:06:53 |
| R26.htm | 54345 | 2022-08-08 16:06:53 |
| R27.htm | 51678 | 2022-08-08 16:06:53 |
| R28.htm | 9499 | 2022-08-08 16:06:53 |
| R29.htm | 17847 | 2022-08-08 16:06:53 |
| R3.htm | 18257 | 2022-08-08 16:06:53 |
| R30.htm | 9503 | 2022-08-08 16:06:53 |
| R31.htm | 36022 | 2022-08-08 16:06:53 |
| R32.htm | 9231 | 2022-08-08 16:06:53 |
| R33.htm | 60234 | 2022-08-08 16:06:53 |
| R34.htm | 27753 | 2022-08-08 16:06:53 |
| R35.htm | 79950 | 2022-08-08 16:06:53 |
| R36.htm | 14109 | 2022-08-08 16:06:53 |
| R37.htm | 12992 | 2022-08-08 16:06:53 |
| R38.htm | 29742 | 2022-08-08 16:06:53 |
| R39.htm | 9324 | 2022-08-08 16:06:53 |
| R4.htm | 89856 | 2022-08-08 16:06:53 |
| R40.htm | 7500 | 2022-08-08 16:06:53 |
| R41.htm | 27245 | 2022-08-08 16:06:53 |
| R42.htm | 13928 | 2022-08-08 16:06:53 |
| R43.htm | 2643 | 2022-08-08 16:06:53 |
| R44.htm | 9578 | 2022-08-08 16:06:53 |
| R45.htm | 57496 | 2022-08-08 16:06:53 |
| R46.htm | 22110 | 2022-08-08 16:06:53 |
| R47.htm | 10410 | 2022-08-08 16:06:53 |
| R48.htm | 46545 | 2022-08-08 16:06:53 |
| R49.htm | 9924 | 2022-08-08 16:06:53 |
| R5.htm | 82483 | 2022-08-08 16:06:53 |
| R50.htm | 46150 | 2022-08-08 16:06:53 |
| R51.htm | 37588 | 2022-08-08 16:06:53 |
| R52.htm | 12377 | 2022-08-08 16:06:53 |
| R53.htm | 9409 | 2022-08-08 16:06:53 |
| R54.htm | 7536 | 2022-08-08 16:06:53 |
| R55.htm | 19647 | 2022-08-08 16:06:53 |
| R56.htm | 23064 | 2022-08-08 16:06:53 |
| R57.htm | 16770 | 2022-08-08 16:06:53 |
| R58.htm | 18540 | 2022-08-08 16:06:53 |
| R59.htm | 41000 | 2022-08-08 16:06:53 |
| R6.htm | 5508 | 2022-08-08 16:06:53 |
| R60.htm | 61808 | 2022-08-08 16:06:53 |
| R61.htm | 24926 | 2022-08-08 16:06:53 |
| R7.htm | 99047 | 2022-08-08 16:06:53 |
| R8.htm | 6909 | 2022-08-08 16:06:53 |
| R9.htm | 56602 | 2022-08-08 16:06:53 |
| report.css | 2767 | 2022-08-08 16:06:53 |
| Show.js | 1085 | 2022-08-08 16:06:53 |