Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001733998-22-000050-index-headers.html | 2022-12-13 18:37:44 | |
| 0001733998-22-000050-index.html | 2022-12-13 18:37:44 | |
| 0001733998-22-000050.txt | 2022-12-13 18:37:44 | |
 0001733998-22-000050-xbrl.zip | 95855 | 2022-12-13 18:37:44 |
| FilingSummary.xml | 1837 | 2022-12-13 18:37:44 |
| Financial_Report.xlsx | 6031 | 2022-12-13 18:37:44 |
| MetaLinks.json | 22126 | 2022-12-13 18:37:44 |
| nwn-20221213.htm | 63298 | 2022-12-13 18:37:44 |
| nwn-20221213.xsd | 2939 | 2022-12-13 18:37:44 |
| nwn-20221213_def.xml | 16431 | 2022-12-13 18:37:44 |
 nwn-20221213_g1.jpg | 57055 | 2022-12-13 18:37:44 |
 nwn-20221213_g2.jpg | 38736 | 2022-12-13 18:37:44 |
| nwn-20221213_htm.xml | 20629 | 2022-12-13 18:37:44 |
| nwn-20221213_lab.xml | 31891 | 2022-12-13 18:37:44 |
| nwn-20221213_pre.xml | 16703 | 2022-12-13 18:37:44 |
| R1.htm | 45116 | 2022-12-13 18:37:44 |
| report.css | 2767 | 2022-12-13 18:37:44 |
| Show.js | 1085 | 2022-12-13 18:37:44 |