Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-26-006907-index-headers.html | 2026-03-04 16:03:28 | |
| 0001437749-26-006907-index.html | 2026-03-04 16:03:28 | |
| 0001437749-26-006907.txt | 2026-03-04 16:03:28 | |
 0001437749-26-006907-xbrl.zip | 14068 | 2026-03-04 16:03:28 |
| ex_927991.htm | 18887 | 2026-03-04 16:03:28 |
| FilingSummary.xml | 1748 | 2026-03-04 16:03:28 |
| MetaLinks.json | 25294 | 2026-03-04 16:03:28 |
| npk-20260227.xsd | 3570 | 2026-03-04 16:03:28 |
| npk-20260227_def.xml | 11420 | 2026-03-04 16:03:28 |
| npk-20260227_lab.xml | 15309 | 2026-03-04 16:03:28 |
| npk-20260227_pre.xml | 11580 | 2026-03-04 16:03:28 |
| npk20260303_8k.htm | 33664 | 2026-03-04 16:03:28 |
| npk20260303_8k_htm.xml | 2849 | 2026-03-04 16:03:28 |
| R1.htm | 38336 | 2026-03-04 16:03:28 |
| report.css | 2767 | 2026-03-04 16:03:28 |
| Show.js | 1084 | 2026-03-04 16:03:28 |