Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-22-021045-index-headers.html | 2022-08-19 16:06:14 | |
| 0001437749-22-021045-index.html | 2022-08-19 16:06:14 | |
| 0001437749-22-021045.txt | 2022-08-19 16:06:14 | |
 0001437749-22-021045-xbrl.zip | 11668 | 2022-08-19 16:06:14 |
| ex_414533.htm | 4192 | 2022-08-19 16:06:14 |
| FilingSummary.xml | 1766 | 2022-08-19 16:06:14 |
| Financial_Report.xlsx | 5837 | 2022-08-19 16:06:14 |
| hpe20220818_8k.htm | 29809 | 2022-08-19 16:06:14 |
| hpe20220818_8k_htm.xml | 4229 | 2022-08-19 16:06:14 |
| hpk-20220819.xsd | 3983 | 2022-08-19 16:06:14 |
| hpk-20220819_def.xml | 13816 | 2022-08-19 16:06:14 |
| hpk-20220819_lab.xml | 18064 | 2022-08-19 16:06:14 |
| hpk-20220819_pre.xml | 13838 | 2022-08-19 16:06:14 |
 image01.jpg | 11913 | 2022-08-19 16:06:14 |
| MetaLinks.json | 21998 | 2022-08-19 16:06:14 |
| R1.htm | 43979 | 2022-08-19 16:06:14 |
| report.css | 2767 | 2022-08-19 16:06:14 |
| Show.js | 1085 | 2022-08-19 16:06:14 |