Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-25-010686-index-headers.html | 2025-04-02 16:13:25 | |
| 0001437749-25-010686-index.html | 2025-04-02 16:13:25 | |
| 0001437749-25-010686.txt | 2025-04-02 16:13:25 | |
 0001437749-25-010686-xbrl.zip | 11619 | 2025-04-02 16:13:25 |
| ex_798070.htm | 4659 | 2025-04-02 16:13:25 |
| FilingSummary.xml | 1748 | 2025-04-02 16:13:25 |
| Financial_Report.xlsx | 5727 | 2025-04-02 16:13:25 |
| MetaLinks.json | 25294 | 2025-04-02 16:13:25 |
| npk-20250328.xsd | 3570 | 2025-04-02 16:13:25 |
| npk-20250328_def.xml | 11420 | 2025-04-02 16:13:25 |
| npk-20250328_lab.xml | 15309 | 2025-04-02 16:13:25 |
| npk-20250328_pre.xml | 11580 | 2025-04-02 16:13:25 |
| npk20250402_8k.htm | 28522 | 2025-04-02 16:13:25 |
| npk20250402_8k_htm.xml | 2866 | 2025-04-02 16:13:25 |
| R1.htm | 38353 | 2025-04-02 16:13:25 |
| report.css | 2767 | 2025-04-02 16:13:25 |
| Show.js | 1085 | 2025-04-02 16:13:25 |