Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-26-010087-index-headers.html | 2026-03-27 16:06:38 | |
| 0001437749-26-010087-index.html | 2026-03-27 16:06:38 | |
| 0001437749-26-010087.txt | 2026-03-27 16:06:38 | |
 0001437749-26-010087-xbrl.zip | 11993 | 2026-03-27 16:06:38 |
| ex_938063.htm | 4703 | 2026-03-27 16:06:38 |
| FilingSummary.xml | 1748 | 2026-03-27 16:06:38 |
| MetaLinks.json | 25294 | 2026-03-27 16:06:38 |
| npk-20260326.xsd | 3571 | 2026-03-27 16:06:38 |
| npk-20260326_def.xml | 11421 | 2026-03-27 16:06:38 |
| npk-20260326_lab.xml | 15310 | 2026-03-27 16:06:38 |
| npk-20260326_pre.xml | 11581 | 2026-03-27 16:06:38 |
| npk20260327_8k.htm | 32724 | 2026-03-27 16:06:38 |
| npk20260327_8k_htm.xml | 2849 | 2026-03-27 16:06:38 |
| R1.htm | 38336 | 2026-03-27 16:06:38 |
| report.css | 2766 | 2026-03-27 16:06:38 |
| Show.js | 1085 | 2026-03-27 16:06:38 |