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|---|---|---|
 0001171843-18-005792-index-headers.html | 2018-08-07 08:02:08 | |
| 0001171843-18-005792-index.html | 2018-08-07 08:02:08 | |
| 0001171843-18-005792.txt | 2018-08-07 08:02:08 | |
 0001171843-18-005792-xbrl.zip | 67010 | 2018-08-07 08:02:08 |
| exh_101.htm | 36018 | 2018-08-07 08:02:08 |
| exh_311.htm | 9141 | 2018-08-07 08:02:08 |
| exh_312.htm | 9069 | 2018-08-07 08:02:08 |
| exh_321.htm | 6165 | 2018-08-07 08:02:08 |
| f10q_080718p.htm | 767882 | 2018-08-07 08:02:08 |
| FilingSummary.xml | 20818 | 2018-08-07 08:02:08 |
| Financial_Report.xlsx | 33135 | 2018-08-07 08:02:08 |
| prto-20180630.xml | 366341 | 2018-08-07 08:02:08 |
| prto-20180630.xsd | 30746 | 2018-08-07 08:02:08 |
| prto-20180630_cal.xml | 23974 | 2018-08-07 08:02:08 |
| prto-20180630_def.xml | 197915 | 2018-08-07 08:02:08 |
| prto-20180630_lab.xml | 183641 | 2018-08-07 08:02:08 |
| prto-20180630_pre.xml | 214158 | 2018-08-07 08:02:08 |
| R1.htm | 27648 | 2018-08-07 08:02:08 |
| R10.htm | 11002 | 2018-08-07 08:02:08 |
| R11.htm | 33620 | 2018-08-07 08:02:08 |
| R12.htm | 6898 | 2018-08-07 08:02:08 |
| R13.htm | 13895 | 2018-08-07 08:02:08 |
| R14.htm | 5685 | 2018-08-07 08:02:08 |
| R15.htm | 41151 | 2018-08-07 08:02:08 |
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| R18.htm | 26405 | 2018-08-07 08:02:08 |
| R19.htm | 11708 | 2018-08-07 08:02:08 |
| R2.htm | 58081 | 2018-08-07 08:02:08 |
| R20.htm | 29882 | 2018-08-07 08:02:08 |
| R21.htm | 4536 | 2018-08-07 08:02:08 |
| R22.htm | 19242 | 2018-08-07 08:02:08 |
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| R27.htm | 20908 | 2018-08-07 08:02:08 |
| R28.htm | 49087 | 2018-08-07 08:02:08 |
| R29.htm | 8552 | 2018-08-07 08:02:08 |
| R3.htm | 20400 | 2018-08-07 08:02:08 |
| R30.htm | 3568 | 2018-08-07 08:02:08 |
| R31.htm | 7674 | 2018-08-07 08:02:08 |
| R4.htm | 48054 | 2018-08-07 08:02:08 |
| R5.htm | 58374 | 2018-08-07 08:02:08 |
| R6.htm | 15423 | 2018-08-07 08:02:08 |
| R7.htm | 35143 | 2018-08-07 08:02:08 |
| R8.htm | 39530 | 2018-08-07 08:02:08 |
| R9.htm | 11057 | 2018-08-07 08:02:08 |
| report.css | 2767 | 2018-08-07 08:02:08 |
| Show.js | 1410 | 2018-08-07 08:02:08 |