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| 0001047469-19-004761-index.html | 2019-08-14 14:27:07 | |
| 0001047469-19-004761.txt | 2019-08-14 14:27:07 | |
 0001047469-19-004761-xbrl.zip | 159305 | 2019-08-14 14:27:07 |
| a2239466z10-q.htm | 1125725 | 2019-08-14 14:27:07 |
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| a2239466zex-31_2.htm | 8227 | 2019-08-14 14:27:07 |
| a2239466zex-32_1.htm | 4392 | 2019-08-14 14:27:07 |
| a2239466zex-32_2.htm | 4434 | 2019-08-14 14:27:07 |
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| FilingSummary.xml | 25685 | 2019-08-14 14:27:07 |
| Financial_Report.xlsx | 67232 | 2019-08-14 14:27:07 |
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| opc-20190630.xml | 2343391 | 2019-08-14 14:27:07 |
| opc-20190630.xsd | 64618 | 2019-08-14 14:27:07 |
| opc-20190630_cal.xml | 81378 | 2019-08-14 14:27:07 |
| opc-20190630_def.xml | 151525 | 2019-08-14 14:27:07 |
| opc-20190630_lab.xml | 529691 | 2019-08-14 14:27:07 |
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| report.css | 2767 | 2019-08-14 14:27:07 |
| Show.js | 1085 | 2019-08-14 14:27:07 |