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 0001085869-20-000007-index-headers.html | 2020-02-25 09:38:25 | |
| 0001085869-20-000007-index.html | 2020-02-25 09:38:25 | |
| 0001085869-20-000007.txt | 2020-02-25 09:38:25 | |
 0001085869-20-000007-xbrl.zip | 34181 | 2020-02-25 09:38:25 |
| FilingSummary.xml | 1834 | 2020-02-25 09:38:25 |
| Financial_Report.xlsx | 5822 | 2020-02-25 09:38:25 |
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| prfpressreleaseq42019.htm | 340584 | 2020-02-25 09:38:25 |
| prft-20200225.xsd | 4635 | 2020-02-25 09:38:25 |
| prft-20200225_cal.xml | 673 | 2020-02-25 09:38:25 |
| prft-20200225_def.xml | 1523 | 2020-02-25 09:38:25 |
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| prft8kq42019.htm | 43727 | 2020-02-25 09:38:25 |
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| prftresultsq42019.htm | 20770 | 2020-02-25 09:38:25 |
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 prftresultsq42019002.jpg | 180841 | 2020-02-25 09:38:25 |
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 prftresultsq42019008.jpg | 78810 | 2020-02-25 09:38:25 |
| R1.htm | 40170 | 2020-02-25 09:38:25 |
| report.css | 2767 | 2020-02-25 09:38:25 |
| Show.js | 1085 | 2020-02-25 09:38:25 |