Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-21-022926-index-headers.html | 2021-09-30 16:01:56 | |
| 0001437749-21-022926-index.html | 2021-09-30 16:01:56 | |
| 0001437749-21-022926.txt | 2021-09-30 16:01:56 | |
 0001437749-21-022926-xbrl.zip | 11693 | 2021-09-30 16:01:56 |
| ex_288032.htm | 5090 | 2021-09-30 16:01:56 |
| FilingSummary.xml | 1751 | 2021-09-30 16:01:56 |
| Financial_Report.xlsx | 5672 | 2021-09-30 16:01:56 |
| MetaLinks.json | 18829 | 2021-09-30 16:01:56 |
| npk-20210928.xsd | 3585 | 2021-09-30 16:01:56 |
| npk-20210928_def.xml | 11421 | 2021-09-30 16:01:56 |
| npk-20210928_lab.xml | 15310 | 2021-09-30 16:01:56 |
| npk-20210928_pre.xml | 11581 | 2021-09-30 16:01:56 |
| npk20210930_8k.htm | 25918 | 2021-09-30 16:01:56 |
| npk20210930_8k_htm.xml | 2563 | 2021-09-30 16:01:56 |
| R1.htm | 38835 | 2021-09-30 16:01:56 |
| report.css | 2767 | 2021-09-30 16:01:56 |
| Show.js | 1085 | 2021-09-30 16:01:56 |