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|---|---|---|
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| 0000788816-26-000035-index.html | 2026-06-01 16:36:30 | |
| 0000788816-26-000035.txt | 2026-06-01 16:36:30 | |
 0000788816-26-000035-xbrl.zip | 13887 | 2026-06-01 16:36:30 |
| exhibit991-noticeofredem.htm | 5238 | 2026-06-01 16:36:30 |
 exhibit991-noticeofredem001.jpg | 230571 | 2026-06-01 16:36:30 |
 exhibit991-noticeofredem002.jpg | 121248 | 2026-06-01 16:36:30 |
| exhibit992-noticeofredem.htm | 5363 | 2026-06-01 16:36:30 |
 exhibit992-noticeofredem001.jpg | 243110 | 2026-06-01 16:36:30 |
 exhibit992-noticeofredem002.jpg | 118419 | 2026-06-01 16:36:30 |
| FilingSummary.xml | 1611 | 2026-06-01 16:36:30 |
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| opc-20260526.htm | 27367 | 2026-06-01 16:36:30 |
| opc-20260526.xsd | 1767 | 2026-06-01 16:36:30 |
| opc-20260526_htm.xml | 2446 | 2026-06-01 16:36:30 |
| opc-20260526_lab.xml | 19154 | 2026-06-01 16:36:30 |
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| R1.htm | 33336 | 2026-06-01 16:36:30 |
| report.css | 2767 | 2026-06-01 16:36:30 |
| Show.js | 1085 | 2026-06-01 16:36:30 |