Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001085869-21-000047-index-headers.html | 2021-04-29 10:33:40 | |
| 0001085869-21-000047-index.html | 2021-04-29 10:33:40 | |
| 0001085869-21-000047.txt | 2021-04-29 10:33:40 | |
 0001085869-21-000047-xbrl.zip | 29573 | 2021-04-29 10:33:40 |
| FilingSummary.xml | 1834 | 2021-04-29 10:33:40 |
| Financial_Report.xlsx | 5706 | 2021-04-29 10:33:40 |
| MetaLinks.json | 18351 | 2021-04-29 10:33:40 |
| prfpressrelease_q12021.htm | 190517 | 2021-04-29 10:33:40 |
| prft-20210429.htm | 36148 | 2021-04-29 10:33:40 |
| prft-20210429.xsd | 2489 | 2021-04-29 10:33:40 |
| prft-20210429_cal.xml | 775 | 2021-04-29 10:33:40 |
| prft-20210429_def.xml | 1731 | 2021-04-29 10:33:40 |
| prft-20210429_htm.xml | 10965 | 2021-04-29 10:33:40 |
| prft-20210429_lab.xml | 25298 | 2021-04-29 10:33:40 |
| prft-20210429_pre.xml | 13461 | 2021-04-29 10:33:40 |
| q12021earningsdeck.htm | 8323 | 2021-04-29 10:33:40 |
 q12021earningsdeck001.jpg | 51834 | 2021-04-29 10:33:40 |
 q12021earningsdeck002.jpg | 142269 | 2021-04-29 10:33:40 |
 q12021earningsdeck003.jpg | 111744 | 2021-04-29 10:33:40 |
 q12021earningsdeck004.jpg | 142961 | 2021-04-29 10:33:40 |
 q12021earningsdeck005.jpg | 105125 | 2021-04-29 10:33:40 |
 q12021earningsdeck006.jpg | 93886 | 2021-04-29 10:33:40 |
| R1.htm | 40176 | 2021-04-29 10:33:40 |
| report.css | 2767 | 2021-04-29 10:33:40 |
| Show.js | 1085 | 2021-04-29 10:33:40 |