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| 0001085869-20-000110-index.html | 2020-10-29 10:09:46 | |
| 0001085869-20-000110.txt | 2020-10-29 10:09:46 | |
 0001085869-20-000110-xbrl.zip | 31777 | 2020-10-29 10:09:46 |
| FilingSummary.xml | 1838 | 2020-10-29 10:09:46 |
| Financial_Report.xlsx | 5485 | 2020-10-29 10:09:46 |
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| prft-20201029.xsd | 2489 | 2020-10-29 10:09:46 |
| prft-20201029_cal.xml | 775 | 2020-10-29 10:09:46 |
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| prft-20201029_lab.xml | 25298 | 2020-10-29 10:09:46 |
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 q32020earningsdeckfinal001.jpg | 57828 | 2020-10-29 10:09:46 |
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| R1.htm | 40176 | 2020-10-29 10:09:46 |
| report.css | 2767 | 2020-10-29 10:09:46 |
| Show.js | 1085 | 2020-10-29 10:09:46 |