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| 0000897101-12-000452-index.html | 2012-03-15 16:02:37 | |
| 0000897101-12-000452.txt | 2012-03-15 16:02:37 | |
 0000897101-12-000452-xbrl.zip | 50768 | 2012-03-15 16:02:37 |
| FilingSummary.xml | 12889 | 2012-03-15 16:02:37 |
| Financial_Report.xls | 293074 | 2012-03-15 16:02:37 |
| npk-20111231.xml | 321902 | 2012-03-15 16:02:37 |
| npk-20111231.xsd | 14540 | 2012-03-15 16:02:37 |
| npk-20111231_cal.xml | 33020 | 2012-03-15 16:02:37 |
| npk-20111231_def.xml | 9447 | 2012-03-15 16:02:37 |
| npk-20111231_lab.xml | 134880 | 2012-03-15 16:02:37 |
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| presto120267_10k.htm | 712866 | 2012-03-15 16:02:37 |
| presto120267_ex21.htm | 6263 | 2012-03-15 16:02:37 |
| presto120267_ex23-1.htm | 3074 | 2012-03-15 16:02:37 |
| presto120267_ex31-1.htm | 10695 | 2012-03-15 16:02:37 |
| presto120267_ex31-2.htm | 10801 | 2012-03-15 16:02:37 |
| presto120267_ex32-1.htm | 3396 | 2012-03-15 16:02:37 |
| presto120267_ex32-2.htm | 3331 | 2012-03-15 16:02:37 |
| R1.htm | 37283 | 2012-03-15 16:02:37 |
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| R9.htm | 14302 | 2012-03-15 16:02:37 |
| report.css | 2721 | 2012-03-15 16:02:37 |
| Show.js | 6423 | 2012-03-15 16:02:37 |