Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000897101-15-000339-index-headers.html | 2015-03-16 16:06:18 | |
| 0000897101-15-000339-index.html | 2015-03-16 16:06:18 | |
| 0000897101-15-000339.txt | 2015-03-16 16:06:18 | |
 0000897101-15-000339-xbrl.zip | 137328 | 2015-03-16 16:06:18 |
| FilingSummary.xml | 39483 | 2015-03-16 16:06:18 |
| Financial_Report.xls | 1664334 | 2015-03-16 16:06:18 |
| Financial_Report.xlsx | 149510 | 2015-03-16 16:06:18 |
| npk-20141231.xml | 1755974 | 2015-03-16 16:06:18 |
| npk-20141231.xsd | 48842 | 2015-03-16 16:06:18 |
| npk-20141231_cal.xml | 72085 | 2015-03-16 16:06:18 |
| npk-20141231_def.xml | 110442 | 2015-03-16 16:06:18 |
| npk-20141231_lab.xml | 363277 | 2015-03-16 16:06:18 |
| npk-20141231_pre.xml | 320929 | 2015-03-16 16:06:18 |
| presto150957_10k.htm | 1441429 | 2015-03-16 16:06:18 |
| presto150957_ex-21.htm | 10119 | 2015-03-16 16:06:18 |
| presto150957_ex23-1.htm | 3499 | 2015-03-16 16:06:18 |
| presto150957_ex31-1.htm | 15085 | 2015-03-16 16:06:18 |
| presto150957_ex31-2.htm | 14118 | 2015-03-16 16:06:18 |
| presto150957_ex32-1.htm | 5569 | 2015-03-16 16:06:18 |
| presto150957_ex32-2.htm | 5068 | 2015-03-16 16:06:18 |
| R1.htm | 38217 | 2015-03-16 16:06:18 |
| R10.htm | 9061 | 2015-03-16 16:06:18 |
| R11.htm | 6519 | 2015-03-16 16:06:18 |
| R12.htm | 7631 | 2015-03-16 16:06:18 |
| R13.htm | 51894 | 2015-03-16 16:06:18 |
| R14.htm | 10000 | 2015-03-16 16:06:18 |
| R15.htm | 132891 | 2015-03-16 16:06:18 |
| R16.htm | 7521 | 2015-03-16 16:06:18 |
| R17.htm | 13481 | 2015-03-16 16:06:18 |
| R18.htm | 23284 | 2015-03-16 16:06:18 |
| R19.htm | 126960 | 2015-03-16 16:06:18 |
| R2.htm | 150325 | 2015-03-16 16:06:18 |
| R20.htm | 23899 | 2015-03-16 16:06:18 |
| R21.htm | 98948 | 2015-03-16 16:06:18 |
| R22.htm | 8978 | 2015-03-16 16:06:18 |
| R23.htm | 49233 | 2015-03-16 16:06:18 |
| R24.htm | 7495 | 2015-03-16 16:06:18 |
| R25.htm | 7224 | 2015-03-16 16:06:18 |
| R26.htm | 8464 | 2015-03-16 16:06:18 |
| R27.htm | 9431 | 2015-03-16 16:06:18 |
| R28.htm | 158874 | 2015-03-16 16:06:18 |
| R29.htm | 179589 | 2015-03-16 16:06:18 |
| R3.htm | 20234 | 2015-03-16 16:06:18 |
| R30.htm | 91564 | 2015-03-16 16:06:18 |
| R31.htm | 26690 | 2015-03-16 16:06:18 |
| R32.htm | 44809 | 2015-03-16 16:06:18 |
| R33.htm | 134614 | 2015-03-16 16:06:18 |
| R34.htm | 17554 | 2015-03-16 16:06:18 |
| R35.htm | 115826 | 2015-03-16 16:06:18 |
| R36.htm | 20275 | 2015-03-16 16:06:18 |
| R37.htm | 96249 | 2015-03-16 16:06:18 |
| R38.htm | 41608 | 2015-03-16 16:06:18 |
| R39.htm | 116828 | 2015-03-16 16:06:18 |
| R4.htm | 76812 | 2015-03-16 16:06:18 |
| R40.htm | 28953 | 2015-03-16 16:06:18 |
| R41.htm | 9230 | 2015-03-16 16:06:18 |
| R42.htm | 13510 | 2015-03-16 16:06:18 |
| R43.htm | 30779 | 2015-03-16 16:06:18 |
| R44.htm | 13737 | 2015-03-16 16:06:18 |
| R45.htm | 18738 | 2015-03-16 16:06:18 |
| R46.htm | 9572 | 2015-03-16 16:06:18 |
| R47.htm | 40084 | 2015-03-16 16:06:18 |
| R48.htm | 31424 | 2015-03-16 16:06:18 |
| R49.htm | 28756 | 2015-03-16 16:06:18 |
| R5.htm | 127113 | 2015-03-16 16:06:18 |
| R50.htm | 13282 | 2015-03-16 16:06:18 |
| R51.htm | 34008 | 2015-03-16 16:06:18 |
| R52.htm | 24481 | 2015-03-16 16:06:18 |
| R53.htm | 41271 | 2015-03-16 16:06:18 |
| R54.htm | 19759 | 2015-03-16 16:06:18 |
| R55.htm | 21317 | 2015-03-16 16:06:18 |
| R56.htm | 6703 | 2015-03-16 16:06:18 |
| R57.htm | 26266 | 2015-03-16 16:06:18 |
| R58.htm | 10864 | 2015-03-16 16:06:18 |
| R59.htm | 73072 | 2015-03-16 16:06:18 |
| R6.htm | 57256 | 2015-03-16 16:06:18 |
| R60.htm | 10976 | 2015-03-16 16:06:18 |
| R61.htm | 26448 | 2015-03-16 16:06:18 |
| R62.htm | 26931 | 2015-03-16 16:06:18 |
| R63.htm | 15654 | 2015-03-16 16:06:18 |
| R64.htm | 32589 | 2015-03-16 16:06:18 |
| R65.htm | 26467 | 2015-03-16 16:06:18 |
| R66.htm | 20452 | 2015-03-16 16:06:18 |
| R67.htm | 28556 | 2015-03-16 16:06:18 |
| R68.htm | 17065 | 2015-03-16 16:06:18 |
| R69.htm | 23055 | 2015-03-16 16:06:18 |
| R7.htm | 12016 | 2015-03-16 16:06:18 |
| R70.htm | 34130 | 2015-03-16 16:06:18 |
| R71.htm | 30585 | 2015-03-16 16:06:18 |
| R8.htm | 125710 | 2015-03-16 16:06:18 |
| R9.htm | 32485 | 2015-03-16 16:06:18 |
| report.css | 2740 | 2015-03-16 16:06:18 |
| Show.js | 1410 | 2015-03-16 16:06:18 |