Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001085869-21-000062-index-headers.html | 2021-05-26 10:07:34 | |
| 0001085869-21-000062-index.html | 2021-05-26 10:07:34 | |
| 0001085869-21-000062.txt | 2021-05-26 10:07:34 | |
 0001085869-21-000062-xbrl.zip | 11230 | 2021-05-26 10:07:34 |
| FilingSummary.xml | 1673 | 2021-05-26 10:07:34 |
| Financial_Report.xlsx | 5705 | 2021-05-26 10:07:34 |
| MetaLinks.json | 18182 | 2021-05-26 10:07:34 |
| prft-20210525.htm | 47650 | 2021-05-26 10:07:34 |
| prft-20210525.xsd | 1980 | 2021-05-26 10:07:34 |
| prft-20210525_htm.xml | 11418 | 2021-05-26 10:07:34 |
| prft-20210525_lab.xml | 25298 | 2021-05-26 10:07:34 |
| prft-20210525_pre.xml | 13461 | 2021-05-26 10:07:34 |
| R1.htm | 40173 | 2021-05-26 10:07:34 |
| report.css | 2766 | 2021-05-26 10:07:34 |
| Show.js | 1084 | 2021-05-26 10:07:34 |