Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-25-038848-index-headers.html | 2025-12-29 16:40:38 | |
| 0001437749-25-038848-index.html | 2025-12-29 16:40:38 | |
| 0001437749-25-038848.txt | 2025-12-29 16:40:38 | |
 0001437749-25-038848-xbrl.zip | 11930 | 2025-12-29 16:40:38 |
| ex_903016.htm | 4545 | 2025-12-29 16:40:38 |
| FilingSummary.xml | 1748 | 2025-12-29 16:40:38 |
| MetaLinks.json | 25294 | 2025-12-29 16:40:38 |
| npk-20251222.xsd | 3572 | 2025-12-29 16:40:38 |
| npk-20251222_def.xml | 11422 | 2025-12-29 16:40:38 |
| npk-20251222_lab.xml | 15311 | 2025-12-29 16:40:38 |
| npk-20251222_pre.xml | 11582 | 2025-12-29 16:40:38 |
| npk20251229_8k.htm | 34152 | 2025-12-29 16:40:38 |
| npk20251229_8k_htm.xml | 2849 | 2025-12-29 16:40:38 |
| R1.htm | 38336 | 2025-12-29 16:40:38 |
| report.css | 2767 | 2025-12-29 16:40:38 |
| Show.js | 1084 | 2025-12-29 16:40:38 |