Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001085869-20-000039-index-headers.html | 2020-05-07 09:49:42 | |
| 0001085869-20-000039-index.html | 2020-05-07 09:49:42 | |
| 0001085869-20-000039.txt | 2020-05-07 09:49:42 | |
 0001085869-20-000039-xbrl.zip | 29338 | 2020-05-07 09:49:42 |
| FilingSummary.xml | 1839 | 2020-05-07 09:49:42 |
| Financial_Report.xlsx | 5830 | 2020-05-07 09:49:42 |
| MetaLinks.json | 19010 | 2020-05-07 09:49:42 |
| prfpressreleaseq12020.htm | 242305 | 2020-05-07 09:49:42 |
| prft-20200507.htm | 44016 | 2020-05-07 09:49:42 |
| prft-20200507.xsd | 2630 | 2020-05-07 09:49:42 |
| prft-20200507_cal.xml | 775 | 2020-05-07 09:49:42 |
| prft-20200507_def.xml | 1731 | 2020-05-07 09:49:42 |
| prft-20200507_htm.xml | 10959 | 2020-05-07 09:49:42 |
| prft-20200507_lab.xml | 25298 | 2020-05-07 09:49:42 |
| prft-20200507_pre.xml | 13461 | 2020-05-07 09:49:42 |
| q12020earningspresentati.htm | 9819 | 2020-05-07 09:49:42 |
 q12020earningspresentati001.jpg | 52487 | 2020-05-07 09:49:42 |
 q12020earningspresentati002.jpg | 132985 | 2020-05-07 09:49:42 |
 q12020earningspresentati003.jpg | 112534 | 2020-05-07 09:49:42 |
 q12020earningspresentati004.jpg | 102016 | 2020-05-07 09:49:42 |
| R1.htm | 40170 | 2020-05-07 09:49:42 |
| report.css | 2767 | 2020-05-07 09:49:42 |
| Show.js | 1085 | 2020-05-07 09:49:42 |