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| 0001171843-19-007045-index.html | 2019-10-31 17:01:11 | |
| 0001171843-19-007045.txt | 2019-10-31 17:01:11 | |
 0001171843-19-007045-xbrl.zip | 89523 | 2019-10-31 17:01:11 |
| exh_311.htm | 13543 | 2019-10-31 17:01:11 |
| exh_312.htm | 13385 | 2019-10-31 17:01:11 |
| exh_321.htm | 9135 | 2019-10-31 17:01:11 |
| f10q_103019p.htm | 552343 | 2019-10-31 17:01:11 |
| FilingSummary.xml | 24688 | 2019-10-31 17:01:11 |
| Financial_Report.xlsx | 40850 | 2019-10-31 17:01:11 |
| prto-20190930.xml | 524391 | 2019-10-31 17:01:11 |
| prto-20190930.xsd | 37540 | 2019-10-31 17:01:11 |
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| R9.htm | 32920 | 2019-10-31 17:01:11 |
| report.css | 2767 | 2019-10-31 17:01:11 |
| Show.js | 1085 | 2019-10-31 17:01:11 |