Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000046765-20-000015-index-headers.html | 2020-05-05 16:27:49 | |
| 0000046765-20-000015-index.html | 2020-05-05 16:27:49 | |
| 0000046765-20-000015.txt | 2020-05-05 16:27:49 | |
 0000046765-20-000015-xbrl.zip | 12859 | 2020-05-05 16:27:49 |
| a2020-04x295028xk.htm | 37443 | 2020-05-05 16:27:49 |
| a2020-04x295028xk_htm.xml | 4466 | 2020-05-05 16:27:49 |
| FilingSummary.xml | 1690 | 2020-05-05 16:27:49 |
| Financial_Report.xlsx | 5795 | 2020-05-05 16:27:49 |
| hp-20200430.xsd | 4425 | 2020-05-05 16:27:49 |
| hp-20200430_cal.xml | 612 | 2020-05-05 16:27:49 |
| hp-20200430_def.xml | 1462 | 2020-05-05 16:27:49 |
| hp-20200430_lab.xml | 26142 | 2020-05-05 16:27:49 |
| hp-20200430_pre.xml | 13568 | 2020-05-05 16:27:49 |
| MetaLinks.json | 18239 | 2020-05-05 16:27:49 |
| R1.htm | 38601 | 2020-05-05 16:27:49 |
| report.css | 2767 | 2020-05-05 16:27:49 |
| Show.js | 1085 | 2020-05-05 16:27:49 |