Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-23-015281-index-headers.html | 2023-05-19 16:01:06 | |
| 0001437749-23-015281-index.html | 2023-05-19 16:01:06 | |
| 0001437749-23-015281.txt | 2023-05-19 16:01:06 | |
 0001437749-23-015281-xbrl.zip | 13134 | 2023-05-19 16:01:06 |
| ex_523804.htm | 7483 | 2023-05-19 16:01:06 |
| FilingSummary.xml | 1764 | 2023-05-19 16:01:06 |
| Financial_Report.xlsx | 5694 | 2023-05-19 16:01:06 |
| MetaLinks.json | 19419 | 2023-05-19 16:01:06 |
| npk-20230516.xsd | 3593 | 2023-05-19 16:01:06 |
| npk-20230516_def.xml | 11529 | 2023-05-19 16:01:06 |
| npk-20230516_lab.xml | 15414 | 2023-05-19 16:01:06 |
| npk-20230516_pre.xml | 11685 | 2023-05-19 16:01:06 |
| npk20230519_8k.htm | 40799 | 2023-05-19 16:01:06 |
| npk20230519_8k_htm.xml | 2565 | 2023-05-19 16:01:06 |
| R1.htm | 38350 | 2023-05-19 16:01:06 |
| report.css | 2767 | 2023-05-19 16:01:06 |
| Show.js | 1085 | 2023-05-19 16:01:06 |