Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-22-018416-index-headers.html | 2022-08-02 16:03:04 | |
| 0001437749-22-018416-index.html | 2022-08-02 16:03:04 | |
| 0001437749-22-018416.txt | 2022-08-02 16:03:04 | |
 0001437749-22-018416-xbrl.zip | 12708 | 2022-08-02 16:03:04 |
| ex_404506.htm | 20431 | 2022-08-02 16:03:04 |
| FilingSummary.xml | 1764 | 2022-08-02 16:03:04 |
| Financial_Report.xlsx | 5694 | 2022-08-02 16:03:04 |
| MetaLinks.json | 18885 | 2022-08-02 16:03:04 |
| npk-20220729.xsd | 3592 | 2022-08-02 16:03:04 |
| npk-20220729_def.xml | 11528 | 2022-08-02 16:03:04 |
| npk-20220729_lab.xml | 15413 | 2022-08-02 16:03:04 |
| npk-20220729_pre.xml | 11684 | 2022-08-02 16:03:04 |
| npk20220801_8k.htm | 25555 | 2022-08-02 16:03:04 |
| npk20220801_8k_htm.xml | 2565 | 2022-08-02 16:03:04 |
| R1.htm | 38804 | 2022-08-02 16:03:04 |
| report.css | 2767 | 2022-08-02 16:03:04 |
| Show.js | 1085 | 2022-08-02 16:03:04 |