Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001047469-17-005172-index-headers.html | 2017-08-10 14:17:29 | |
| 0001047469-17-005172-index.html | 2017-08-10 14:17:29 | |
| 0001047469-17-005172.txt | 2017-08-10 14:17:29 | |
 0001047469-17-005172-xbrl.zip | 124965 | 2017-08-10 14:17:29 |
| a2232920z10-q.htm | 1003657 | 2017-08-10 14:17:29 |
| a2232920zex-31_1.htm | 12857 | 2017-08-10 14:17:29 |
| a2232920zex-31_2.htm | 13100 | 2017-08-10 14:17:29 |
| a2232920zex-32_1.htm | 6415 | 2017-08-10 14:17:29 |
| a2232920zex-32_2.htm | 6866 | 2017-08-10 14:17:29 |
| a2232920zex-4_1.htm | 166520 | 2017-08-10 14:17:29 |
| a2232920zex-4_2.htm | 27857 | 2017-08-10 14:17:29 |
| a2232920zex-4_3.htm | 30225 | 2017-08-10 14:17:29 |
| 142848 | 2017-08-10 14:17:29 | |
| FilingSummary.xml | 22697 | 2017-08-10 14:17:29 |
| Financial_Report.xlsx | 55696 | 2017-08-10 14:17:29 |
 g49433.jpg | 10712 | 2017-08-10 14:17:29 |
| opc-20170630.xml | 1825433 | 2017-08-10 14:17:29 |
| opc-20170630.xsd | 47991 | 2017-08-10 14:17:29 |
| opc-20170630_cal.xml | 59147 | 2017-08-10 14:17:29 |
| opc-20170630_def.xml | 116153 | 2017-08-10 14:17:29 |
| opc-20170630_lab.xml | 400451 | 2017-08-10 14:17:29 |
| opc-20170630_pre.xml | 250453 | 2017-08-10 14:17:29 |
| R1.htm | 21630 | 2017-08-10 14:17:29 |
| R10.htm | 111432 | 2017-08-10 14:17:29 |
| R11.htm | 16559 | 2017-08-10 14:17:29 |
| R12.htm | 90612 | 2017-08-10 14:17:29 |
| R13.htm | 9684 | 2017-08-10 14:17:29 |
| R14.htm | 6001 | 2017-08-10 14:17:29 |
| R15.htm | 92756 | 2017-08-10 14:17:29 |
| R16.htm | 5393 | 2017-08-10 14:17:29 |
| R17.htm | 15349 | 2017-08-10 14:17:29 |
| R18.htm | 23221 | 2017-08-10 14:17:29 |
| R19.htm | 224604 | 2017-08-10 14:17:29 |
| R2.htm | 106173 | 2017-08-10 14:17:29 |
| R20.htm | 187326 | 2017-08-10 14:17:29 |
| R21.htm | 106886 | 2017-08-10 14:17:29 |
| R22.htm | 90071 | 2017-08-10 14:17:29 |
| R23.htm | 93254 | 2017-08-10 14:17:29 |
| R24.htm | 4099 | 2017-08-10 14:17:29 |
| R25.htm | 52366 | 2017-08-10 14:17:29 |
| R26.htm | 8285 | 2017-08-10 14:17:29 |
| R27.htm | 27496 | 2017-08-10 14:17:29 |
| R28.htm | 12484 | 2017-08-10 14:17:29 |
| R29.htm | 20957 | 2017-08-10 14:17:29 |
| R3.htm | 44252 | 2017-08-10 14:17:29 |
| R30.htm | 27285 | 2017-08-10 14:17:29 |
| R31.htm | 22805 | 2017-08-10 14:17:29 |
| R32.htm | 4183 | 2017-08-10 14:17:29 |
| R33.htm | 15720 | 2017-08-10 14:17:29 |
| R34.htm | 9009 | 2017-08-10 14:17:29 |
| R35.htm | 64235 | 2017-08-10 14:17:29 |
| R36.htm | 30269 | 2017-08-10 14:17:29 |
| R37.htm | 86736 | 2017-08-10 14:17:29 |
| R4.htm | 12136 | 2017-08-10 14:17:29 |
| R5.htm | 18877 | 2017-08-10 14:17:29 |
| R6.htm | 97894 | 2017-08-10 14:17:29 |
| R7.htm | 8359 | 2017-08-10 14:17:29 |
| R8.htm | 223134 | 2017-08-10 14:17:29 |
| R9.htm | 186950 | 2017-08-10 14:17:29 |
| report.css | 2767 | 2017-08-10 14:17:29 |
| Show.js | 1410 | 2017-08-10 14:17:29 |