Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-26-028014-index-headers.html | 2026-08-14 16:16:26 | |
| 0001437749-26-028014-index.html | 2026-08-14 16:16:26 | |
| 0001437749-26-028014.txt | 2026-08-14 16:16:26 | |
 0001437749-26-028014-xbrl.zip | 11843 | 2026-08-14 16:16:26 |
| ex_1005284.htm | 4954 | 2026-08-14 16:16:26 |
| FilingSummary.xml | 1748 | 2026-08-14 16:16:26 |
| MetaLinks.json | 25324 | 2026-08-14 16:16:26 |
| npk-20260813.xsd | 3571 | 2026-08-14 16:16:26 |
| npk-20260813_def.xml | 11421 | 2026-08-14 16:16:26 |
| npk-20260813_lab.xml | 15310 | 2026-08-14 16:16:26 |
| npk-20260813_pre.xml | 11581 | 2026-08-14 16:16:26 |
| npk20260814_8k.htm | 30743 | 2026-08-14 16:16:26 |
| npk20260814_8k_htm.xml | 2866 | 2026-08-14 16:16:26 |
| R1.htm | 38353 | 2026-08-14 16:16:26 |
| report.css | 2766 | 2026-08-14 16:16:26 |
| Show.js | 1085 | 2026-08-14 16:16:26 |