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| 0000784977-22-000034-index.html | 2022-04-27 21:12:29 | |
| 0000784977-22-000034.txt | 2022-04-27 21:12:29 | |
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| ex31110-q20220331.htm | 10870 | 2022-04-27 21:12:29 |
| ex31210-q20220331.htm | 10886 | 2022-04-27 21:12:29 |
| ex3210-q20220331.htm | 7428 | 2022-04-27 21:12:29 |
| FilingSummary.xml | 29307 | 2022-04-27 21:12:29 |
| Financial_Report.xlsx | 86925 | 2022-04-27 21:12:29 |
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| por-20220331.htm | 1773756 | 2022-04-27 21:12:29 |
| por-20220331.xsd | 45322 | 2022-04-27 21:12:29 |
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| por-20220331_lab.xml | 571400 | 2022-04-27 21:12:29 |
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| report.css | 2767 | 2022-04-27 21:12:29 |
| Show.js | 1085 | 2022-04-27 21:12:29 |