Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001733998-21-000029-index-headers.html | 2021-10-25 19:54:29 | |
| 0001733998-21-000029-index.html | 2021-10-25 19:54:29 | |
| 0001733998-21-000029.txt | 2021-10-25 19:54:29 | |
 0001733998-21-000029-xbrl.zip | 96547 | 2021-10-25 19:54:29 |
| FilingSummary.xml | 1830 | 2021-10-25 19:54:29 |
| Financial_Report.xlsx | 5992 | 2021-10-25 19:54:29 |
| MetaLinks.json | 22422 | 2021-10-25 19:54:29 |
| nwn-20211021.htm | 64325 | 2021-10-25 19:54:29 |
| nwn-20211021.xsd | 2951 | 2021-10-25 19:54:29 |
| nwn-20211021_def.xml | 16611 | 2021-10-25 19:54:29 |
 nwn-20211021_g1.jpg | 57055 | 2021-10-25 19:54:29 |
 nwn-20211021_g2.jpg | 38736 | 2021-10-25 19:54:29 |
| nwn-20211021_htm.xml | 20635 | 2021-10-25 19:54:29 |
| nwn-20211021_lab.xml | 32059 | 2021-10-25 19:54:29 |
| nwn-20211021_pre.xml | 16871 | 2021-10-25 19:54:29 |
| R1.htm | 45749 | 2021-10-25 19:54:29 |
| report.css | 2767 | 2021-10-25 19:54:29 |
| Show.js | 1085 | 2021-10-25 19:54:29 |