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|---|---|---|
 0000009346-20-000038-index-headers.html | 2020-05-06 17:13:31 | |
| 0000009346-20-000038-index.html | 2020-05-06 17:13:31 | |
| 0000009346-20-000038.txt | 2020-05-06 17:13:31 | |
 0000009346-20-000038-xbrl.zip | 176538 | 2020-05-06 17:13:31 |
| exhibit101.htm | 9091 | 2020-05-06 17:13:31 |
| exhibit102.htm | 70005 | 2020-05-06 17:13:31 |
| exhibit311.htm | 12874 | 2020-05-06 17:13:31 |
| exhibit312.htm | 12860 | 2020-05-06 17:13:31 |
| exhibit32.htm | 5715 | 2020-05-06 17:13:31 |
| FilingSummary.xml | 27073 | 2020-05-06 17:13:31 |
| Financial_Report.xlsx | 61384 | 2020-05-06 17:13:31 |
| form10q.htm | 940899 | 2020-05-06 17:13:31 |
 image1.jpg | 8225 | 2020-05-06 17:13:31 |
| ptvc-20200331.xml | 1333725 | 2020-05-06 17:13:31 |
| ptvc-20200331.xsd | 42621 | 2020-05-06 17:13:31 |
| ptvc-20200331_cal.xml | 88729 | 2020-05-06 17:13:31 |
| ptvc-20200331_def.xml | 220624 | 2020-05-06 17:13:31 |
| ptvc-20200331_lab.xml | 653804 | 2020-05-06 17:13:31 |
| ptvc-20200331_pre.xml | 351452 | 2020-05-06 17:13:31 |
| R1.htm | 35140 | 2020-05-06 17:13:31 |
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| R9.htm | 133814 | 2020-05-06 17:13:31 |
| report.css | 2767 | 2020-05-06 17:13:31 |
| Show.js | 1085 | 2020-05-06 17:13:31 |