Parent Directory| Name | Size | Last Modified |
|---|---|---|
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| 0001437749-22-015749-index.html | 2022-06-23 16:05:37 | |
| 0001437749-22-015749.txt | 2022-06-23 16:05:37 | |
 0001437749-22-015749-xbrl.zip | 208781 | 2022-06-23 16:05:37 |
| ex_389048.htm | 2216 | 2022-06-23 16:05:37 |
| ex_389049.htm | 472313 | 2022-06-23 16:05:37 |
| ex_389050.htm | 107196 | 2022-06-23 16:05:37 |
| ex_389051.htm | 44248 | 2022-06-23 16:05:37 |
| ex_389480.htm | 690925 | 2022-06-23 16:05:37 |
| ex_389481.htm | 661533 | 2022-06-23 16:05:37 |
| ex_389482.htm | 46902 | 2022-06-23 16:05:37 |
| FilingSummary.xml | 1950 | 2022-06-23 16:05:37 |
| Financial_Report.xlsx | 5837 | 2022-06-23 16:05:37 |
| hpe20220622_8k.htm | 45712 | 2022-06-23 16:05:37 |
| hpe20220622_8k_htm.xml | 4229 | 2022-06-23 16:05:37 |
| hpk-20220623.xsd | 3983 | 2022-06-23 16:05:37 |
| hpk-20220623_def.xml | 13816 | 2022-06-23 16:05:37 |
| hpk-20220623_lab.xml | 18064 | 2022-06-23 16:05:37 |
| hpk-20220623_pre.xml | 13838 | 2022-06-23 16:05:37 |
| MetaLinks.json | 21882 | 2022-06-23 16:05:37 |
| R1.htm | 44494 | 2022-06-23 16:05:37 |
| report.css | 2767 | 2022-06-23 16:05:37 |
| Show.js | 1085 | 2022-06-23 16:05:37 |