Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-25-018012-index-headers.html | 2025-05-21 16:51:01 | |
| 0001437749-25-018012-index.html | 2025-05-21 16:51:01 | |
| 0001437749-25-018012.txt | 2025-05-21 16:51:01 | |
 0001437749-25-018012-xbrl.zip | 11776 | 2025-05-21 16:51:01 |
| ex_822164.htm | 4753 | 2025-05-21 16:51:01 |
| FilingSummary.xml | 1748 | 2025-05-21 16:51:01 |
| MetaLinks.json | 25294 | 2025-05-21 16:51:01 |
| npk-20250520.xsd | 3571 | 2025-05-21 16:51:01 |
| npk-20250520_def.xml | 11421 | 2025-05-21 16:51:01 |
| npk-20250520_lab.xml | 15310 | 2025-05-21 16:51:01 |
| npk-20250520_pre.xml | 11581 | 2025-05-21 16:51:01 |
| npk20250521_8k.htm | 39014 | 2025-05-21 16:51:01 |
| npk20250521_8k_htm.xml | 2849 | 2025-05-21 16:51:01 |
| R1.htm | 38334 | 2025-05-21 16:51:01 |
| report.css | 2767 | 2025-05-21 16:51:01 |
| Show.js | 1084 | 2025-05-21 16:51:01 |