Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-21-010897-index-headers.html | 2021-05-05 16:03:41 | |
| 0001437749-21-010897-index.html | 2021-05-05 16:03:41 | |
| 0001437749-21-010897.txt | 2021-05-05 16:03:41 | |
 0001437749-21-010897-xbrl.zip | 12768 | 2021-05-05 16:03:41 |
| ex_246832.htm | 14048 | 2021-05-05 16:03:41 |
| FilingSummary.xml | 1757 | 2021-05-05 16:03:41 |
| Financial_Report.xlsx | 5672 | 2021-05-05 16:03:41 |
| MetaLinks.json | 19323 | 2021-05-05 16:03:41 |
| npk-20210430.xsd | 3691 | 2021-05-05 16:03:41 |
| npk-20210430_def.xml | 11582 | 2021-05-05 16:03:41 |
| npk-20210430_lab.xml | 15465 | 2021-05-05 16:03:41 |
| npk-20210430_pre.xml | 11736 | 2021-05-05 16:03:41 |
| npk20210505_8k.htm | 24559 | 2021-05-05 16:03:41 |
| npk20210505_8k_htm.xml | 2569 | 2021-05-05 16:03:41 |
| R1.htm | 38874 | 2021-05-05 16:03:41 |
| report.css | 2767 | 2021-05-05 16:03:41 |
| Show.js | 1085 | 2021-05-05 16:03:41 |