Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001733998-23-000085-index-headers.html | 2023-12-29 16:08:27 | |
| 0001733998-23-000085-index.html | 2023-12-29 16:08:27 | |
| 0001733998-23-000085.txt | 2023-12-29 16:08:27 | |
 0001733998-23-000085-xbrl.zip | 93824 | 2023-12-29 16:08:27 |
| FilingSummary.xml | 1852 | 2023-12-29 16:08:27 |
| Financial_Report.xlsx | 6032 | 2023-12-29 16:08:27 |
| MetaLinks.json | 22566 | 2023-12-29 16:08:27 |
| nwn-20231229.htm | 49047 | 2023-12-29 16:08:27 |
| nwn-20231229.xsd | 2943 | 2023-12-29 16:08:27 |
| nwn-20231229_def.xml | 16357 | 2023-12-29 16:08:27 |
 nwn-20231229_g1.jpg | 57055 | 2023-12-29 16:08:27 |
 nwn-20231229_g2.jpg | 38736 | 2023-12-29 16:08:27 |
| nwn-20231229_htm.xml | 5087 | 2023-12-29 16:08:27 |
| nwn-20231229_lab.xml | 31893 | 2023-12-29 16:08:27 |
| nwn-20231229_pre.xml | 16705 | 2023-12-29 16:08:27 |
| R1.htm | 45114 | 2023-12-29 16:08:27 |
| report.css | 2767 | 2023-12-29 16:08:27 |
| Show.js | 1085 | 2023-12-29 16:08:27 |