Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001725526-21-000022-index-headers.html | 2021-03-31 16:09:21 | |
| 0001725526-21-000022-index.html | 2021-03-31 16:09:21 | |
| 0001725526-21-000022.txt | 2021-03-31 16:09:21 | |
 0001725526-21-000022-xbrl.zip | 45330 | 2021-03-31 16:09:21 |
| FilingSummary.xml | 1759 | 2021-03-31 16:09:21 |
| Financial_Report.xlsx | 6076 | 2021-03-31 16:09:21 |
| hpr-12312020x10kaxex311.htm | 9627 | 2021-03-31 16:09:21 |
| hpr-12312020x10kaxex312.htm | 9595 | 2021-03-31 16:09:21 |
| hpr-20201231.htm | 325854 | 2021-03-31 16:09:21 |
| hpr-20201231.xsd | 2409 | 2021-03-31 16:09:21 |
| hpr-20201231_cal.xml | 703 | 2021-03-31 16:09:21 |
| hpr-20201231_def.xml | 1636 | 2021-03-31 16:09:21 |
| hpr-20201231_htm.xml | 16233 | 2021-03-31 16:09:21 |
| hpr-20201231_lab.xml | 33940 | 2021-03-31 16:09:21 |
| hpr-20201231_pre.xml | 18025 | 2021-03-31 16:09:21 |
| MetaLinks.json | 23969 | 2021-03-31 16:09:21 |
| R1.htm | 58908 | 2021-03-31 16:09:21 |
| report.css | 2767 | 2021-03-31 16:09:21 |
| Show.js | 1085 | 2021-03-31 16:09:21 |