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|---|---|---|
 0001171843-19-005225-index-headers.html | 2019-08-07 08:01:20 | |
| 0001171843-19-005225-index.html | 2019-08-07 08:01:20 | |
| 0001171843-19-005225.txt | 2019-08-07 08:01:20 | |
 0001171843-19-005225-xbrl.zip | 83595 | 2019-08-07 08:01:20 |
| exh_311.htm | 12203 | 2019-08-07 08:01:20 |
| exh_312.htm | 11935 | 2019-08-07 08:01:20 |
| exh_321.htm | 6369 | 2019-08-07 08:01:20 |
| f10q_080819p.htm | 573646 | 2019-08-07 08:01:20 |
| FilingSummary.xml | 28107 | 2019-08-07 08:01:20 |
| Financial_Report.xlsx | 42391 | 2019-08-07 08:01:20 |
| prto-20190630.xml | 504353 | 2019-08-07 08:01:20 |
| prto-20190630.xsd | 37147 | 2019-08-07 08:01:20 |
| prto-20190630_cal.xml | 26062 | 2019-08-07 08:01:20 |
| prto-20190630_def.xml | 259299 | 2019-08-07 08:01:20 |
| prto-20190630_lab.xml | 220370 | 2019-08-07 08:01:20 |
| prto-20190630_pre.xml | 280977 | 2019-08-07 08:01:20 |
| R1.htm | 32660 | 2019-08-07 08:01:20 |
| R10.htm | 15934 | 2019-08-07 08:01:20 |
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| R8.htm | 39171 | 2019-08-07 08:01:20 |
| R9.htm | 40126 | 2019-08-07 08:01:20 |
| report.css | 2767 | 2019-08-07 08:01:20 |
| Show.js | 1085 | 2019-08-07 08:01:20 |