Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-22-023234-index-headers.html | 2022-09-29 16:01:23 | |
| 0001437749-22-023234-index.html | 2022-09-29 16:01:23 | |
| 0001437749-22-023234.txt | 2022-09-29 16:01:23 | |
 0001437749-22-023234-xbrl.zip | 11823 | 2022-09-29 16:01:23 |
| ex_427688.htm | 5355 | 2022-09-29 16:01:23 |
| FilingSummary.xml | 1766 | 2022-09-29 16:01:23 |
| Financial_Report.xlsx | 5694 | 2022-09-29 16:01:23 |
| MetaLinks.json | 18885 | 2022-09-29 16:01:23 |
| npk-20220923.xsd | 3593 | 2022-09-29 16:01:23 |
| npk-20220923_def.xml | 11529 | 2022-09-29 16:01:23 |
| npk-20220923_lab.xml | 15414 | 2022-09-29 16:01:23 |
| npk-20220923_pre.xml | 11685 | 2022-09-29 16:01:23 |
| npk20220929_8k.htm | 25251 | 2022-09-29 16:01:23 |
| npk20220929_8k_htm.xml | 2565 | 2022-09-29 16:01:23 |
| R1.htm | 38354 | 2022-09-29 16:01:23 |
| report.css | 2767 | 2022-09-29 16:01:23 |
| Show.js | 1085 | 2022-09-29 16:01:23 |