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|---|---|---|
 0000320575-19-000019-index-headers.html | 2019-05-02 08:27:54 | |
| 0000320575-19-000019-index.html | 2019-05-02 08:27:54 | |
| 0000320575-19-000019.txt | 2019-05-02 08:27:54 | |
 0000320575-19-000019-xbrl.zip | 269830 | 2019-05-02 08:27:54 |
| exhibit101-2019timexbasedp.htm | 52591 | 2019-05-02 08:27:54 |
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| exhibit312q12019.htm | 11848 | 2019-05-02 08:27:54 |
| exhibit321q12019.htm | 5997 | 2019-05-02 08:27:54 |
| exhibit322q12019.htm | 6032 | 2019-05-02 08:27:54 |
| FilingSummary.xml | 40131 | 2019-05-02 08:27:54 |
| Financial_Report.xlsx | 88407 | 2019-05-02 08:27:54 |
| form10q-q12019.htm | 1580192 | 2019-05-02 08:27:54 |
| pes-20190331.xml | 2361170 | 2019-05-02 08:27:54 |
| pes-20190331.xsd | 73494 | 2019-05-02 08:27:54 |
| pes-20190331_cal.xml | 114395 | 2019-05-02 08:27:54 |
| pes-20190331_def.xml | 429123 | 2019-05-02 08:27:54 |
| pes-20190331_lab.xml | 832709 | 2019-05-02 08:27:54 |
| pes-20190331_pre.xml | 574603 | 2019-05-02 08:27:54 |
| R1.htm | 24046 | 2019-05-02 08:27:54 |
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| R9.htm | 38147 | 2019-05-02 08:27:54 |
| report.css | 2767 | 2019-05-02 08:27:54 |
| Show.js | 1085 | 2019-05-02 08:27:54 |
 spotpricesandrigcount1yr.jpg | 59142 | 2019-05-02 08:27:54 |
 spotpricesandrigcount3yr.jpg | 67806 | 2019-05-02 08:27:54 |