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| 0001437749-22-019468-index.html | 2022-08-09 06:02:57 | |
| 0001437749-22-019468.txt | 2022-08-09 06:02:57 | |
 0001437749-22-019468-xbrl.zip | 11042 | 2022-08-09 06:02:57 |
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| ex_408782.htm | 10586 | 2022-08-09 06:02:57 |
| FilingSummary.xml | 1767 | 2022-08-09 06:02:57 |
| Financial_Report.xlsx | 5839 | 2022-08-09 06:02:57 |
| hpe20220803b_8k.htm | 36169 | 2022-08-09 06:02:57 |
| hpe20220803b_8k_htm.xml | 4229 | 2022-08-09 06:02:57 |
| hpk-20220809.xsd | 3982 | 2022-08-09 06:02:57 |
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| R1.htm | 44495 | 2022-08-09 06:02:57 |
| report.css | 2767 | 2022-08-09 06:02:57 |
| Show.js | 1085 | 2022-08-09 06:02:57 |