Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001733998-24-000007-index-headers.html | 2024-02-22 18:30:33 | |
| 0001733998-24-000007-index.html | 2024-02-22 18:30:33 | |
| 0001733998-24-000007.txt | 2024-02-22 18:30:33 | |
 0001733998-24-000007-xbrl.zip | 113785 | 2024-02-22 18:30:33 |
| a991pressreleaseq42023.htm | 275841 | 2024-02-22 18:30:33 |
| FilingSummary.xml | 1854 | 2024-02-22 18:30:33 |
| Financial_Report.xlsx | 6038 | 2024-02-22 18:30:33 |
| MetaLinks.json | 22680 | 2024-02-22 18:30:33 |
| nwn-20240223.htm | 50984 | 2024-02-22 18:30:33 |
| nwn-20240223.xsd | 2943 | 2024-02-22 18:30:33 |
| nwn-20240223_def.xml | 16357 | 2024-02-22 18:30:33 |
 nwn-20240223_g1.jpg | 57055 | 2024-02-22 18:30:33 |
 nwn-20240223_g2.jpg | 38736 | 2024-02-22 18:30:33 |
| nwn-20240223_htm.xml | 5091 | 2024-02-22 18:30:33 |
| nwn-20240223_lab.xml | 31893 | 2024-02-22 18:30:33 |
| nwn-20240223_pre.xml | 16705 | 2024-02-22 18:30:33 |
 nwnholdingshza33.jpg | 57055 | 2024-02-22 18:30:33 |
| R1.htm | 45121 | 2024-02-22 18:30:33 |
| report.css | 2767 | 2024-02-22 18:30:33 |
| Show.js | 1085 | 2024-02-22 18:30:33 |