Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000320575-21-000025-index-headers.html | 2021-04-30 14:16:12 | |
| 0000320575-21-000025-index.html | 2021-04-30 14:16:12 | |
| 0000320575-21-000025.txt | 2021-04-30 14:16:12 | |
 0000320575-21-000025-xbrl.zip | 71950 | 2021-04-30 14:16:12 |
| exhibit101formofindemnific.htm | 154215 | 2021-04-30 14:16:12 |
| exhibit313-202010ka.htm | 3440 | 2021-04-30 14:16:12 |
| exhibit314-202010ka.htm | 3444 | 2021-04-30 14:16:12 |
| FilingSummary.xml | 1809 | 2021-04-30 14:16:12 |
| Financial_Report.xlsx | 6504 | 2021-04-30 14:16:12 |
| MetaLinks.json | 25425 | 2021-04-30 14:16:12 |
| pes-20201231.htm | 346785 | 2021-04-30 14:16:12 |
| pes-20201231.xsd | 2439 | 2021-04-30 14:16:12 |
| pes-20201231_cal.xml | 723 | 2021-04-30 14:16:12 |
| pes-20201231_def.xml | 1656 | 2021-04-30 14:16:12 |
| pes-20201231_htm.xml | 18063 | 2021-04-30 14:16:12 |
| pes-20201231_lab.xml | 35293 | 2021-04-30 14:16:12 |
| pes-20201231_pre.xml | 18688 | 2021-04-30 14:16:12 |
| R1.htm | 60700 | 2021-04-30 14:16:12 |
| report.css | 2767 | 2021-04-30 14:16:12 |
| Show.js | 1085 | 2021-04-30 14:16:12 |