Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000897101-21-000437-index-headers.html | 2021-05-20 16:19:12 | |
| 0000897101-21-000437-index.html | 2021-05-20 16:19:12 | |
| 0000897101-21-000437.txt | 2021-05-20 16:19:12 | |
 0000897101-21-000437-xbrl.zip | 14788 | 2021-05-20 16:19:12 |
| FilingSummary.xml | 1632 | 2021-05-20 16:19:12 |
| Financial_Report.xlsx | 5657 | 2021-05-20 16:19:12 |
| MetaLinks.json | 37478 | 2021-05-20 16:19:12 |
| npk-20210518.xsd | 2726 | 2021-05-20 16:19:12 |
| npk-20210518_lab.xml | 34591 | 2021-05-20 16:19:12 |
| npk-20210518_pre.xml | 22691 | 2021-05-20 16:19:12 |
| presto210716_8k.htm | 31747 | 2021-05-20 16:19:12 |
| presto210716_8k_htm.xml | 3495 | 2021-05-20 16:19:12 |
| presto210716_ex99-1.htm | 9694 | 2021-05-20 16:19:12 |
| R1.htm | 38608 | 2021-05-20 16:19:12 |
| report.css | 2767 | 2021-05-20 16:19:12 |
| Show.js | 1084 | 2021-05-20 16:19:12 |