Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000009346-20-000076-index-headers.html | 2020-11-04 16:59:43 | |
| 0000009346-20-000076-index.html | 2020-11-04 16:59:43 | |
| 0000009346-20-000076.txt | 2020-11-04 16:59:43 | |
 0000009346-20-000076-xbrl.zip | 217815 | 2020-11-04 16:59:43 |
| exhibit311.htm | 13823 | 2020-11-04 16:59:43 |
| exhibit312.htm | 13809 | 2020-11-04 16:59:43 |
| exhibit32.htm | 6789 | 2020-11-04 16:59:43 |
| FilingSummary.xml | 26980 | 2020-11-04 16:59:43 |
| Financial_Report.xlsx | 75644 | 2020-11-04 16:59:43 |
| form10q.htm | 1695619 | 2020-11-04 16:59:43 |
| form10q_htm.xml | 1560993 | 2020-11-04 16:59:43 |
 image0.jpg | 8225 | 2020-11-04 16:59:43 |
| MetaLinks.json | 572175 | 2020-11-04 16:59:43 |
| ptvc-20200930.xsd | 41634 | 2020-11-04 16:59:43 |
| ptvc-20200930_cal.xml | 87488 | 2020-11-04 16:59:43 |
| ptvc-20200930_def.xml | 230878 | 2020-11-04 16:59:43 |
| ptvc-20200930_lab.xml | 667697 | 2020-11-04 16:59:43 |
| ptvc-20200930_pre.xml | 362218 | 2020-11-04 16:59:43 |
| R1.htm | 57439 | 2020-11-04 16:59:43 |
| R10.htm | 20150 | 2020-11-04 16:59:43 |
| R11.htm | 33894 | 2020-11-04 16:59:43 |
| R12.htm | 29138 | 2020-11-04 16:59:43 |
| R13.htm | 6020 | 2020-11-04 16:59:43 |
| R14.htm | 11383 | 2020-11-04 16:59:43 |
| R15.htm | 197978 | 2020-11-04 16:59:43 |
| R16.htm | 26940 | 2020-11-04 16:59:43 |
| R17.htm | 13221 | 2020-11-04 16:59:43 |
| R18.htm | 44224 | 2020-11-04 16:59:43 |
| R19.htm | 6228 | 2020-11-04 16:59:43 |
| R2.htm | 79530 | 2020-11-04 16:59:43 |
| R20.htm | 5406 | 2020-11-04 16:59:43 |
| R21.htm | 43087 | 2020-11-04 16:59:43 |
| R22.htm | 182798 | 2020-11-04 16:59:43 |
| R23.htm | 20005 | 2020-11-04 16:59:43 |
| R24.htm | 32997 | 2020-11-04 16:59:43 |
| R25.htm | 24898 | 2020-11-04 16:59:43 |
| R26.htm | 191526 | 2020-11-04 16:59:43 |
| R27.htm | 19138 | 2020-11-04 16:59:43 |
| R28.htm | 42921 | 2020-11-04 16:59:43 |
| R29.htm | 39826 | 2020-11-04 16:59:43 |
| R3.htm | 12468 | 2020-11-04 16:59:43 |
| R30.htm | 52681 | 2020-11-04 16:59:43 |
| R31.htm | 69229 | 2020-11-04 16:59:43 |
| R32.htm | 28115 | 2020-11-04 16:59:43 |
| R33.htm | 9523 | 2020-11-04 16:59:43 |
| R34.htm | 27062 | 2020-11-04 16:59:43 |
| R35.htm | 25893 | 2020-11-04 16:59:43 |
| R36.htm | 21928 | 2020-11-04 16:59:43 |
| R37.htm | 11511 | 2020-11-04 16:59:43 |
| R38.htm | 86219 | 2020-11-04 16:59:43 |
| R39.htm | 25363 | 2020-11-04 16:59:43 |
| R4.htm | 71862 | 2020-11-04 16:59:43 |
| R40.htm | 90774 | 2020-11-04 16:59:43 |
| R41.htm | 34220 | 2020-11-04 16:59:43 |
| R42.htm | 10896 | 2020-11-04 16:59:43 |
| R43.htm | 26865 | 2020-11-04 16:59:43 |
| R44.htm | 10917 | 2020-11-04 16:59:43 |
| R45.htm | 13974 | 2020-11-04 16:59:43 |
| R5.htm | 26131 | 2020-11-04 16:59:43 |
| R6.htm | 87592 | 2020-11-04 16:59:43 |
| R7.htm | 54891 | 2020-11-04 16:59:43 |
| R8.htm | 27524 | 2020-11-04 16:59:43 |
| R9.htm | 179947 | 2020-11-04 16:59:43 |
| report.css | 2767 | 2020-11-04 16:59:43 |
| Show.js | 1085 | 2020-11-04 16:59:43 |