Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001733998-22-000024-index-headers.html | 2022-07-15 16:40:23 | |
| 0001733998-22-000024-index.html | 2022-07-15 16:40:23 | |
| 0001733998-22-000024.txt | 2022-07-15 16:40:23 | |
 0001733998-22-000024-xbrl.zip | 95698 | 2022-07-15 16:40:23 |
| FilingSummary.xml | 1835 | 2022-07-15 16:40:23 |
| Financial_Report.xlsx | 6034 | 2022-07-15 16:40:23 |
| MetaLinks.json | 22072 | 2022-07-15 16:40:23 |
| nwn-20220715.htm | 61405 | 2022-07-15 16:40:23 |
| nwn-20220715.xsd | 2939 | 2022-07-15 16:40:23 |
| nwn-20220715_def.xml | 16431 | 2022-07-15 16:40:23 |
 nwn-20220715_g1.jpg | 57055 | 2022-07-15 16:40:23 |
 nwn-20220715_g2.jpg | 38736 | 2022-07-15 16:40:23 |
| nwn-20220715_htm.xml | 20629 | 2022-07-15 16:40:23 |
| nwn-20220715_lab.xml | 31891 | 2022-07-15 16:40:23 |
| nwn-20220715_pre.xml | 16703 | 2022-07-15 16:40:23 |
| R1.htm | 45658 | 2022-07-15 16:40:23 |
| report.css | 2767 | 2022-07-15 16:40:23 |
| Show.js | 1085 | 2022-07-15 16:40:23 |