Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-22-013060-index-headers.html | 2022-05-19 16:15:22 | |
| 0001437749-22-013060-index.html | 2022-05-19 16:15:22 | |
| 0001437749-22-013060.txt | 2022-05-19 16:15:22 | |
 0001437749-22-013060-xbrl.zip | 13231 | 2022-05-19 16:15:22 |
| ex_378122.htm | 10267 | 2022-05-19 16:15:22 |
| FilingSummary.xml | 1764 | 2022-05-19 16:15:22 |
| Financial_Report.xlsx | 5671 | 2022-05-19 16:15:22 |
| MetaLinks.json | 18885 | 2022-05-19 16:15:22 |
| npk-20220517.xsd | 3593 | 2022-05-19 16:15:22 |
| npk-20220517_def.xml | 11529 | 2022-05-19 16:15:22 |
| npk-20220517_lab.xml | 15414 | 2022-05-19 16:15:22 |
| npk-20220517_pre.xml | 11685 | 2022-05-19 16:15:22 |
| npk20220519_8k.htm | 33606 | 2022-05-19 16:15:22 |
| npk20220519_8k_htm.xml | 2565 | 2022-05-19 16:15:22 |
| R1.htm | 38957 | 2022-05-19 16:15:22 |
| report.css | 2767 | 2022-05-19 16:15:22 |
| Show.js | 1085 | 2022-05-19 16:15:22 |