Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-25-010892-index-headers.html | 2025-04-03 16:06:17 | |
| 0001437749-25-010892-index.html | 2025-04-03 16:06:17 | |
| 0001437749-25-010892.txt | 2025-04-03 16:06:17 | |
 0001437749-25-010892-xbrl.zip | 22787 | 2025-04-03 16:06:17 |
| ex_795173.htm | 5710 | 2025-04-03 16:06:17 |
| ex_795174.htm | 5432 | 2025-04-03 16:06:17 |
| ex_796425.htm | 20624 | 2025-04-03 16:06:17 |
| ex_796440.htm | 18970 | 2025-04-03 16:06:17 |
| FilingSummary.xml | 1779 | 2025-04-03 16:06:17 |
| Financial_Report.xlsx | 7216 | 2025-04-03 16:06:17 |
| MetaLinks.json | 34323 | 2025-04-03 16:06:17 |
| npk-20241231.xsd | 3570 | 2025-04-03 16:06:17 |
| npk-20241231_def.xml | 16360 | 2025-04-03 16:06:17 |
| npk-20241231_lab.xml | 22316 | 2025-04-03 16:06:17 |
| npk-20241231_pre.xml | 17235 | 2025-04-03 16:06:17 |
| npk20241231_10ka.htm | 92249 | 2025-04-03 16:06:17 |
| npk20241231_10ka_htm.xml | 6486 | 2025-04-03 16:06:17 |
| R1.htm | 65970 | 2025-04-03 16:06:17 |
| report.css | 2767 | 2025-04-03 16:06:17 |
| Show.js | 1085 | 2025-04-03 16:06:17 |