Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001733998-23-000030-index-headers.html | 2023-05-25 19:50:58 | |
| 0001733998-23-000030-index.html | 2023-05-25 19:50:58 | |
| 0001733998-23-000030.txt | 2023-05-25 19:50:58 | |
 0001733998-23-000030-xbrl.zip | 102579 | 2023-05-25 19:50:58 |
| ex991pressreleaseofnorthwe.htm | 20191 | 2023-05-25 19:50:58 |
| FilingSummary.xml | 1883 | 2023-05-25 19:50:58 |
| Financial_Report.xlsx | 6031 | 2023-05-25 19:50:58 |
 image_0a.jpg | 21767 | 2023-05-25 19:50:58 |
| MetaLinks.json | 22604 | 2023-05-25 19:50:58 |
| nwn-20230525.htm | 76564 | 2023-05-25 19:50:58 |
| nwn-20230525.xsd | 2939 | 2023-05-25 19:50:58 |
| nwn-20230525_def.xml | 16431 | 2023-05-25 19:50:58 |
 nwn-20230525_g1.jpg | 57055 | 2023-05-25 19:50:58 |
 nwn-20230525_g2.jpg | 38736 | 2023-05-25 19:50:58 |
| nwn-20230525_htm.xml | 20629 | 2023-05-25 19:50:58 |
| nwn-20230525_lab.xml | 31891 | 2023-05-25 19:50:58 |
| nwn-20230525_pre.xml | 16703 | 2023-05-25 19:50:58 |
| R1.htm | 45112 | 2023-05-25 19:50:58 |
| report.css | 2767 | 2023-05-25 19:50:58 |
| Show.js | 1085 | 2023-05-25 19:50:58 |