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| 0000320575-21-000042-index.html | 2021-08-06 08:59:04 | |
| 0000320575-21-000042.txt | 2021-08-06 08:59:04 | |
 0000320575-21-000042-xbrl.zip | 385871 | 2021-08-06 08:59:04 |
| exhibit311-q22021.htm | 9233 | 2021-08-06 08:59:04 |
| exhibit312-q22021.htm | 9194 | 2021-08-06 08:59:04 |
| exhibit321-q22021.htm | 4675 | 2021-08-06 08:59:04 |
| exhibit322-q22021.htm | 4705 | 2021-08-06 08:59:04 |
| exhibit410-firstamendmentt.htm | 18018 | 2021-08-06 08:59:04 |
| exhibit411-secondamendment.htm | 18440 | 2021-08-06 08:59:04 |
| FilingSummary.xml | 31648 | 2021-08-06 08:59:04 |
| Financial_Report.xlsx | 88710 | 2021-08-06 08:59:04 |
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| pes-20210630.htm | 2407100 | 2021-08-06 08:59:04 |
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| report.css | 2767 | 2021-08-06 08:59:04 |
| Show.js | 1085 | 2021-08-06 08:59:04 |