Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000009346-19-000027-index-headers.html | 2019-05-08 16:44:11 | |
| 0000009346-19-000027-index.html | 2019-05-08 16:44:11 | |
| 0000009346-19-000027.txt | 2019-05-08 16:44:11 | |
 0000009346-19-000027-xbrl.zip | 147890 | 2019-05-08 16:44:11 |
| exhibit311.htm | 15506 | 2019-05-08 16:44:11 |
| exhibit312.htm | 15442 | 2019-05-08 16:44:11 |
| exhibit32.htm | 7337 | 2019-05-08 16:44:11 |
| FilingSummary.xml | 26389 | 2019-05-08 16:44:11 |
| Financial_Report.xlsx | 59585 | 2019-05-08 16:44:11 |
| form10q.htm | 1125652 | 2019-05-08 16:44:11 |
 image1.jpg | 8225 | 2019-05-08 16:44:11 |
| ptvc-20190331.xml | 1535280 | 2019-05-08 16:44:11 |
| ptvc-20190331.xsd | 40575 | 2019-05-08 16:44:11 |
| ptvc-20190331_cal.xml | 89101 | 2019-05-08 16:44:11 |
| ptvc-20190331_def.xml | 210456 | 2019-05-08 16:44:11 |
| ptvc-20190331_lab.xml | 630879 | 2019-05-08 16:44:11 |
| ptvc-20190331_pre.xml | 343730 | 2019-05-08 16:44:11 |
| R1.htm | 30002 | 2019-05-08 16:44:11 |
| R10.htm | 12649 | 2019-05-08 16:44:11 |
| R11.htm | 35112 | 2019-05-08 16:44:11 |
| R12.htm | 17152 | 2019-05-08 16:44:11 |
| R13.htm | 6070 | 2019-05-08 16:44:11 |
| R14.htm | 6132 | 2019-05-08 16:44:11 |
| R15.htm | 208769 | 2019-05-08 16:44:11 |
| R16.htm | 29735 | 2019-05-08 16:44:11 |
| R17.htm | 5145 | 2019-05-08 16:44:11 |
| R18.htm | 57408 | 2019-05-08 16:44:11 |
| R19.htm | 6069 | 2019-05-08 16:44:11 |
| R2.htm | 72340 | 2019-05-08 16:44:11 |
| R20.htm | 5856 | 2019-05-08 16:44:11 |
| R21.htm | 34734 | 2019-05-08 16:44:11 |
| R22.htm | 174860 | 2019-05-08 16:44:11 |
| R23.htm | 12507 | 2019-05-08 16:44:11 |
| R24.htm | 34150 | 2019-05-08 16:44:11 |
| R25.htm | 16413 | 2019-05-08 16:44:11 |
| R26.htm | 201811 | 2019-05-08 16:44:11 |
| R27.htm | 22309 | 2019-05-08 16:44:11 |
| R28.htm | 55491 | 2019-05-08 16:44:11 |
| R29.htm | 10764 | 2019-05-08 16:44:11 |
| R3.htm | 12457 | 2019-05-08 16:44:11 |
| R30.htm | 51780 | 2019-05-08 16:44:11 |
| R31.htm | 62809 | 2019-05-08 16:44:11 |
| R32.htm | 22471 | 2019-05-08 16:44:11 |
| R33.htm | 8877 | 2019-05-08 16:44:11 |
| R34.htm | 27040 | 2019-05-08 16:44:11 |
| R35.htm | 21517 | 2019-05-08 16:44:11 |
| R36.htm | 21906 | 2019-05-08 16:44:11 |
| R37.htm | 4975 | 2019-05-08 16:44:11 |
| R38.htm | 86474 | 2019-05-08 16:44:11 |
| R39.htm | 25354 | 2019-05-08 16:44:11 |
| R4.htm | 52868 | 2019-05-08 16:44:11 |
| R40.htm | 61777 | 2019-05-08 16:44:11 |
| R41.htm | 23167 | 2019-05-08 16:44:11 |
| R42.htm | 42086 | 2019-05-08 16:44:11 |
| R43.htm | 23868 | 2019-05-08 16:44:11 |
| R44.htm | 30119 | 2019-05-08 16:44:11 |
| R5.htm | 19851 | 2019-05-08 16:44:11 |
| R6.htm | 47959 | 2019-05-08 16:44:11 |
| R7.htm | 52324 | 2019-05-08 16:44:11 |
| R8.htm | 21586 | 2019-05-08 16:44:11 |
| R9.htm | 170038 | 2019-05-08 16:44:11 |
| report.css | 2767 | 2019-05-08 16:44:11 |
| Show.js | 1085 | 2019-05-08 16:44:11 |