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| 0001085869-17-000040-index.html | 2017-08-03 15:58:40 | |
| 0001085869-17-000040.txt | 2017-08-03 15:58:40 | |
 0001085869-17-000040-xbrl.zip | 129729 | 2017-08-03 15:58:40 |
| FilingSummary.xml | 31485 | 2017-08-03 15:58:40 |
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| form10q.htm | 671204 | 2017-08-03 15:58:40 |
| prft-20170630.xml | 711778 | 2017-08-03 15:58:40 |
| prft-20170630.xsd | 41582 | 2017-08-03 15:58:40 |
| prft-20170630_cal.xml | 69730 | 2017-08-03 15:58:40 |
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| prft-20170630_lab.xml | 621093 | 2017-08-03 15:58:40 |
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| prftq22017_exhibit311.htm | 8821 | 2017-08-03 15:58:40 |
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| prftq22017_exhibit321.htm | 7456 | 2017-08-03 15:58:40 |
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| report.css | 2767 | 2017-08-03 15:58:40 |
| Show.js | 1410 | 2017-08-03 15:58:40 |