Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-21-019229-index-headers.html | 2021-08-10 07:30:38 | |
| 0001437749-21-019229-index.html | 2021-08-10 07:30:38 | |
| 0001437749-21-019229.txt | 2021-08-10 07:30:38 | |
 0001437749-21-019229-xbrl.zip | 11065 | 2021-08-10 07:30:38 |
| ex_273252.htm | 9037 | 2021-08-10 07:30:38 |
| FilingSummary.xml | 1822 | 2021-08-10 07:30:38 |
| Financial_Report.xlsx | 5790 | 2021-08-10 07:30:38 |
| hpe20210805b_8k.htm | 29315 | 2021-08-10 07:30:38 |
| hpe20210805b_8k_htm.xml | 4228 | 2021-08-10 07:30:38 |
| hpk-20210810.xsd | 3975 | 2021-08-10 07:30:38 |
| hpk-20210810_def.xml | 13704 | 2021-08-10 07:30:38 |
| hpk-20210810_lab.xml | 17956 | 2021-08-10 07:30:38 |
| hpk-20210810_pre.xml | 13730 | 2021-08-10 07:30:38 |
| MetaLinks.json | 22056 | 2021-08-10 07:30:38 |
| R1.htm | 44534 | 2021-08-10 07:30:38 |
| report.css | 2767 | 2021-08-10 07:30:38 |
| Show.js | 1085 | 2021-08-10 07:30:38 |
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