Parent Directory| Name | Size | Last Modified |
|---|---|---|
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| 0001437749-23-009539-index.html | 2023-04-05 16:32:42 | |
| 0001437749-23-009539.txt | 2023-04-05 16:32:42 | |
 0001437749-23-009539-xbrl.zip | 11574 | 2023-04-05 16:32:42 |
| ex_496803.htm | 4930 | 2023-04-05 16:32:42 |
| FilingSummary.xml | 1764 | 2023-04-05 16:32:42 |
| Financial_Report.xlsx | 5695 | 2023-04-05 16:32:42 |
| MetaLinks.json | 19419 | 2023-04-05 16:32:42 |
| npk-20230331.xsd | 3592 | 2023-04-05 16:32:42 |
| npk-20230331_def.xml | 11528 | 2023-04-05 16:32:42 |
| npk-20230331_lab.xml | 15413 | 2023-04-05 16:32:42 |
| npk-20230331_pre.xml | 11684 | 2023-04-05 16:32:42 |
| npk20230404_8k.htm | 25532 | 2023-04-05 16:32:42 |
| npk20230404_8k_htm.xml | 2565 | 2023-04-05 16:32:42 |
| R1.htm | 38352 | 2023-04-05 16:32:42 |
| report.css | 2767 | 2023-04-05 16:32:42 |
| Show.js | 1085 | 2023-04-05 16:32:42 |