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| 0000897101-12-000767-index.html | 2012-05-11 16:01:37 | |
| 0000897101-12-000767.txt | 2012-05-11 16:01:37 | |
 0000897101-12-000767-xbrl.zip | 23760 | 2012-05-11 16:01:37 |
| FilingSummary.xml | 7021 | 2012-05-11 16:01:37 |
| Financial_Report.xls | 75894 | 2012-05-11 16:01:37 |
| npk-20120401.xml | 78245 | 2012-05-11 16:01:37 |
| npk-20120401.xsd | 8974 | 2012-05-11 16:01:37 |
| npk-20120401_cal.xml | 29807 | 2012-05-11 16:01:37 |
| npk-20120401_lab.xml | 94609 | 2012-05-11 16:01:37 |
| npk-20120401_pre.xml | 61532 | 2012-05-11 16:01:37 |
| presto121821_10q.htm | 196811 | 2012-05-11 16:01:37 |
| presto121821_ex31-1.htm | 8870 | 2012-05-11 16:01:37 |
| presto121821_ex31-2.htm | 8870 | 2012-05-11 16:01:37 |
| presto121821_ex32-1.htm | 2260 | 2012-05-11 16:01:37 |
| presto121821_ex32-2.htm | 2260 | 2012-05-11 16:01:37 |
| R1.htm | 26730 | 2012-05-11 16:01:37 |
| R10.htm | 7975 | 2012-05-11 16:01:37 |
| R11.htm | 8559 | 2012-05-11 16:01:37 |
| R12.htm | 5418 | 2012-05-11 16:01:37 |
| R2.htm | 128374 | 2012-05-11 16:01:37 |
| R3.htm | 11961 | 2012-05-11 16:01:37 |
| R4.htm | 74698 | 2012-05-11 16:01:37 |
| R5.htm | 92513 | 2012-05-11 16:01:37 |
| R6.htm | 7297 | 2012-05-11 16:01:37 |
| R7.htm | 27619 | 2012-05-11 16:01:37 |
| R8.htm | 13771 | 2012-05-11 16:01:37 |
| R9.htm | 20552 | 2012-05-11 16:01:37 |
| report.css | 2721 | 2012-05-11 16:01:37 |
| Show.js | 6423 | 2012-05-11 16:01:37 |