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| 0001415889-16-007125-index.html | 2016-09-14 11:11:22 | |
| 0001415889-16-007125.txt | 2016-09-14 11:11:22 | |
 0001415889-16-007125-xbrl.zip | 97425 | 2016-09-14 11:11:22 |
| ex31-1.htm | 11948 | 2016-09-14 11:11:22 |
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| ex32-1.htm | 6961 | 2016-09-14 11:11:22 |
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| FilingSummary.xml | 29783 | 2016-09-14 11:11:22 |
| Financial_Report.xlsx | 60925 | 2016-09-14 11:11:22 |
| ptrc-20160731.xml | 434125 | 2016-09-14 11:11:22 |
| ptrc-20160731.xsd | 39888 | 2016-09-14 11:11:22 |
| ptrc-20160731_cal.xml | 58382 | 2016-09-14 11:11:22 |
| ptrc-20160731_def.xml | 143982 | 2016-09-14 11:11:22 |
| ptrc-20160731_lab.xml | 315021 | 2016-09-14 11:11:22 |
| ptrc-20160731_pre.xml | 253224 | 2016-09-14 11:11:22 |
| ptrc10q_jul312016.htm | 689091 | 2016-09-14 11:11:22 |
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| report.css | 2767 | 2016-09-14 11:11:22 |
| Show.js | 1410 | 2016-09-14 11:11:22 |