Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001085869-20-000046-index-headers.html | 2020-05-22 17:16:23 | |
| 0001085869-20-000046-index.html | 2020-05-22 17:16:23 | |
| 0001085869-20-000046.txt | 2020-05-22 17:16:23 | |
 0001085869-20-000046-xbrl.zip | 13480 | 2020-05-22 17:16:23 |
| FilingSummary.xml | 1750 | 2020-05-22 17:16:23 |
| Financial_Report.xlsx | 5827 | 2020-05-22 17:16:23 |
| MetaLinks.json | 19010 | 2020-05-22 17:16:23 |
| prft-20200520.htm | 73753 | 2020-05-22 17:16:23 |
| prft-20200520.xsd | 2630 | 2020-05-22 17:16:23 |
| prft-20200520_cal.xml | 775 | 2020-05-22 17:16:23 |
| prft-20200520_def.xml | 1731 | 2020-05-22 17:16:23 |
| prft-20200520_htm.xml | 11399 | 2020-05-22 17:16:23 |
| prft-20200520_lab.xml | 25298 | 2020-05-22 17:16:23 |
| prft-20200520_pre.xml | 13461 | 2020-05-22 17:16:23 |
| R1.htm | 40169 | 2020-05-22 17:16:23 |
| report.css | 2767 | 2020-05-22 17:16:23 |
| Show.js | 1084 | 2020-05-22 17:16:23 |